2131129872810 has 64 divisors (see below), whose sum is σ = 5684007715200. Its totient is φ = 568201827456.

The previous prime is 2131129872791. The next prime is 2131129872847. The reversal of 2131129872810 is 182789211312.

2131129872810 is a `hidden beast` number, since 21 + 311 + 298 + 7 + 28 + 1 + 0 = 666.

It is a super-2 number, since 2×2131129872810² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 861081 + ... + 2236899.

It is an arithmetic number, because the mean of its divisors is an integer number (88812620550).

Almost surely, 2^{2131129872810} is an apocalyptic number.

2131129872810 is an abundant number, since it is smaller than the sum of its proper divisors (3552877842390).

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

2131129872810 is a wasteful number, since it uses less digits than its factorization.

2131129872810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1381572 (or 1381566 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 45.

The spelling of 2131129872810 in words is "two trillion, one hundred thirty-one billion, one hundred twenty-nine million, eight hundred seventy-two thousand, eight hundred ten".