31331123101212 has 96 divisors (see below), whose sum is σ = 79964177529600. Its totient is φ = 9469018944000.

The previous prime is 31331123101207. The next prime is 31331123101219. The reversal of 31331123101212 is 21210132113313.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31331123101219) 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, 790790739 + ... + 790830357.

It is an arithmetic number, because the mean of its divisors is an integer number (832960182600).

Almost surely, 2^{31331123101212} is an apocalyptic number.

It is an amenable number.

31331123101212 is an abundant number, since it is smaller than the sum of its proper divisors (48633054428388).

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

31331123101212 is a wasteful number, since it uses less digits than its factorization.

31331123101212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55427 (or 55425 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 24.

Adding to 31331123101212 its reverse (21210132113313), we get a palindrome (52541255214525).

The spelling of 31331123101212 in words is "thirty-one trillion, three hundred thirty-one billion, one hundred twenty-three million, one hundred one thousand, two hundred twelve".