A U.S. coin has its year of minting on the front and its numerical value written out on the back. A U.S. bill, depending on the denomination, has many more numbers on its front and back.
A one-dollar bill notably has the numeral one on each of its four corners on the front and back. The hundred-dollar bill, in its design as of 2013, also has the numeral of 100 on each of its four corners in the front, but only three occurrences are visible on the back; the hundreds on the right corners are replaced by a large 100 printed sideways. The serial number of both bills is visible in green on the bottom left and upper right areas of the front. Other numbers visible on U.S. bills include a note number position, a Federal Reserve district number and a series date.