31312022013212 has 96 divisors (see below), whose sum is σ = 61361811947520. Its totient is φ = 13903850188800.

The previous prime is 31312022013187. The next prime is 31312022013277. The reversal of 31312022013212 is 21231022021313.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 142102868 + ... + 142323044.

It is an arithmetic number, because the mean of its divisors is an integer number (639185541120).

Almost surely, 2^{31312022013212} is an apocalyptic number.

It is an amenable number.

31312022013212 is a deficient number, since it is larger than the sum of its proper divisors (30049789934308).

31312022013212 is a wasteful number, since it uses less digits than its factorization.

31312022013212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221451 (or 221449 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 31312022013212 its reverse (21231022021313), we get a palindrome (52543044034525).

The spelling of 31312022013212 in words is "thirty-one trillion, three hundred twelve billion, twenty-two million, thirteen thousand, two hundred twelve".