Trillion

A trillion is equal to 1,000,000,000,000. It is the largest number the average person is aware of.

Scale

 * It takes Niagara Falls 77 days and 3 hours to spill 1 trillion gallons of water.
 * Alpha Centauri, the 2nd closest star to Earth, is 26 trillion miles away.
 * The human body contains 50 trillion gallons of water.
 * There are roughly a trillion fish in the world.