31213313112212 has 96 divisors (see below), whose sum is σ = 68163379200000. Its totient is φ = 12150035562240.

The previous prime is 31213313112209. The next prime is 31213313112217. The reversal of 31213313112212 is 21221131331213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31213313112217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1772568464 + ... + 1772586072.

It is an arithmetic number, because the mean of its divisors is an integer number (710035200000).

Almost surely, 2^{31213313112212} is an apocalyptic number.

It is an amenable number.

31213313112212 is an abundant number, since it is smaller than the sum of its proper divisors (36950066087788).

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

31213313112212 is a wasteful number, since it uses less digits than its factorization.

31213313112212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22509 (or 22507 counting only the distinct ones).

The product of its digits is 1296, while the sum is 26.

Adding to 31213313112212 its reverse (21221131331213), we get a palindrome (52434444443425).

The spelling of 31213313112212 in words is "thirty-one trillion, two hundred thirteen billion, three hundred thirteen million, one hundred twelve thousand, two hundred twelve".