A billion and one.
a billion and one
After a billion comes a trillion, which is equal to 1,000 billion.
9 billion and 1.
1 billion and one
Ok first, 1 zillion is not a number, people just made that up. Second, the number that comes after on BILLION is two billion.
a billion one
trillion
1,000,000,001
trillion
quadrillion.
Quadrillion