1,000,000,000 (1 x 10^9) One Trillion

1,000,000,000,000 (1 x 10^12) One Quadrillion

1,000,000,000,000,000 (1 x 10^15) One Quintillion

1,000,000,000,000,000,000 (1 x 10^18) One Sextillion

1,000,000,000,000,000,000,000 (1 x 10^21) One Septillion

1 x 10^24 One Octillion

1 x 10^27 One Nonillion

1 x 10^30 One Decillion

skip ahead

1 x 10^99 One duotrigintillion

1 x 10^100 (a 1 followed by 100 zeroes) Commonly called a googol (not google) it could also be called ten duotrigintillion.

1 x 10^(10^100) would be a googolplex. That would be a 1 followed by a googol of zeroes.