We all know what a million is. That's something most of us can get our arms around. So what's a trillion?

A million seconds is 12 days. A trillion seconds is 31,700 years.

Put another way, if you made a million dollars a day and for easy math worked 250 days a year, in a year, you'd have $250 million. In 4 years you would have $1 billion. To get a trillion dollars at a million dollars a day, you'd have to work 4,000 years.

Graphically, here's the difference represented by stacks of $100 bills:

a million dollars	a billion dollars	a trillion dollars Yes, those pallets are double stacked