2121666700 has 36 divisors (see below), whose sum is σ = 4606375312. Its totient is φ = 848232000.

The previous prime is 2121666683. The next prime is 2121666721. The reversal of 2121666700 is 76661212.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 250942 + ... + 259258.

Almost surely, 2^2121666700 is an apocalyptic number.

2121666700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121666700 is an abundant number, since it is smaller than the sum of its proper divisors (2484708612).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2121666700 is a wasteful number, since it uses less digits than its factorization.

2121666700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10882 (or 10875 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 2121666700 is about 46061.5533824034. The cubic root of 2121666700 is about 1284.9682197775.

The spelling of 2121666700 in words is "two billion, one hundred twenty-one million, six hundred sixty-six thousand, seven hundred".