Money facts

The Largest Banknote

Measuring in at roughly the size of a sheet of legal paper, the world's largest single banknote is the 100,000-peso note created by the government of the Philippines in 1998. Designed to celebrate a century of independence from Spanish rule, the note was offered only to collectors, who could purchase one of the limited-edition notes for 180,000 pesos, or about $3,700.

One in a Million

The largest banknote ever issued by the Bank of England was the £1,000,000 note, issued in 1948 as a temporary measure during the postwar reconstruction in the Marshall Plan. Designed for use by the U.S. government only, the notes were canceled after just a few months, allowing very few to escape into private hands. But just because the notes are out of service doesn't mean they're valueless — in 2008, one of two known surviving notes fetched almost $120,000 at auction.

The World's First ATM

AP

It might just be the best idea to come to a man in the bathtub since Archimedes' time. While taking a soak, inventor John Shepherd-Barron devised what is hailed as the world's first automatic teller machine, although his claim to the title is a matter of dispute. He pitched the device to the British bank Barclays. It accepted immediately, and the first model was built and installed in London in 1967. Though the machine used PIN (personal identification number) codes, a concept Shepherd-Barron also claims to have invented, it was dependent on checks impregnated with the (slightly) radioactive isotope carbon 14 to initiate a withdrawal, as the magnetic coding for ATM cards had not yet been developed. One other difference from its ubiquitous modern counterpart: it didn't charge a fee.

You Can't Take It with You

Alan Schein Photography / CORBIS

All bills eventually wear out. The smaller the value, the more often you use it — and the shorter its lifespan. A $1 bill lasts a measly 21 months, while a Ben Franklin can last more than seven years. Over that time, of course, owing to inflation, its value will decline — which is the perfect excuse to spend it quickly.

It's All About the Elizabeths

Andrew Brookes / CORBIS

From Australia to Trinidad and Tobago, Queen Elizabeth II's portrait has graced the currencies of 33 different countries — more than that of any other individual. Canada was the first to use the British monarch's image, in 1935, when it printed the 9-year-old Princess on its $20 notes. Over the years, 26 different portraits of Elizabeth have been used in the U.K. and its current and former colonies, dominions and territories — most of which were commissioned with the direct purpose of putting them on banknotes. However, some countries, such as Rhodesia (now Zimbabwe), Malta and Fiji, used already existing portraits. The Queen is frequently shown in formal crown-and-scepter attire, although Canada and Australia prefer to depict her in a plain dress and pearls. And while many countries update their currencies to reflect the Queen's advancing age, others enjoy keeping her young. When Belize redesigned its currency in 1980, it selected a portrait that was already 20 years old.

Dirty Money

moodboard / CORBIS

All money, it turns out, could stand to be laundered: the stuff is filthy. Studies show that a solid majority of U.S. bills are contaminated by cocaine. Drug traffickers often use coke-sullied hands to move cash, and many users roll bills into sniffing straws; the brushes and rollers in ATMs may distribute the nose candy through the rest of the money supply.