312133131012 has 24 divisors (see below), whose sum is σ = 729758586816. Its totient is φ = 103837527328.

The previous prime is 312133131001. The next prime is 312133131043. The reversal of 312133131012 is 210131331213.

It is a happy number.

It is a super-2 number, since 2×312133131012² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 312133131012.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25849923 + ... + 25861994.

It is an arithmetic number, because the mean of its divisors is an integer number (30406607784).

Almost surely, 2^312133131012 is an apocalyptic number.

It is an amenable number.

312133131012 is an abundant number, since it is smaller than the sum of its proper divisors (417625455804).

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

312133131012 is a wasteful number, since it uses less digits than its factorization.

312133131012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51712427 (or 51712425 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 312133131012 its reverse (210131331213), we get a palindrome (522264462225).

The spelling of 312133131012 in words is "three hundred twelve billion, one hundred thirty-three million, one hundred thirty-one thousand, twelve".