In 2008 I mentioned that a one hundred billion dollar banknote was being auctioned on eBay with a high bid of AU$87.
Today, you can buy a one hundred trillion dollar banknote on Amazon for US$0.90 (plus $4.94 shipping).
Ironically, there's no similar limit on the amount of coinage. A little-known statute gives the secretary of the Treasury the authority to issue platinum coins in any denomination. So some commentators have suggested that the Treasury create two $1 trillion coins, deposit them in its account in the Federal Reserve and write checks on the proceeds.3 ways Obama could bypass Congress (Thanks, Fipi Lele!)