2131890693021 has 12 divisors (see below), whose sum is σ = 3083680566720. Its totient is φ = 1419283739400.

The previous prime is 2131890692989. The next prime is 2131890693041. The reversal of 2131890693021 is 1203960981312.

It is a happy number.

2131890693021 is a `hidden beast` number, since 21 + 318 + 9 + 0 + 6 + 9 + 302 + 1 = 666.

It is not a de Polignac number, because 2131890693021 - 2⁵ = 2131890692989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131890693041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 164720055 + ... + 164732996.

It is an arithmetic number, because the mean of its divisors is an integer number (256973380560).

Almost surely, 2^{2131890693021} is an apocalyptic number.

It is an amenable number.

2131890693021 is a deficient number, since it is larger than the sum of its proper divisors (951789873699).

2131890693021 is a wasteful number, since it uses less digits than its factorization.

2131890693021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329453776 (or 329453773 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The spelling of 2131890693021 in words is "two trillion, one hundred thirty-one billion, eight hundred ninety million, six hundred ninety-three thousand, twenty-one".