31202311320012 has 48 divisors (see below), whose sum is σ = 83210967850752. Its totient is φ = 8914431341760.

The previous prime is 31202311319957. The next prime is 31202311320013. The reversal of 31202311320012 is 21002311320213.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (31202311320013) 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 15 ways as a sum of consecutive naturals, for example, 9259314 + ... + 12171257.

It is an arithmetic number, because the mean of its divisors is an integer number (1733561830224).

Almost surely, 2^{31202311320012} is an apocalyptic number.

It is an amenable number.

31202311320012 is an abundant number, since it is smaller than the sum of its proper divisors (52008656530740).

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

31202311320012 is a wasteful number, since it uses less digits than its factorization.

31202311320012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21447918 (or 21447916 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 31202311320012 its reverse (21002311320213), we get a palindrome (52204622640225).

The spelling of 31202311320012 in words is "thirty-one trillion, two hundred two billion, three hundred eleven million, three hundred twenty thousand, twelve".