31331010121312 has 48 divisors (see below), whose sum is σ = 68294800268352. Its totient is φ = 14028810491520.

The previous prime is 31331010121289. The next prime is 31331010121337. The reversal of 31331010121312 is 21312101013313.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

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, 664219338 + ... + 664266505.

It is an arithmetic number, because the mean of its divisors is an integer number (1422808338924).

Almost surely, 2^{31331010121312} is an apocalyptic number.

31331010121312 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31331010121312 is an abundant number, since it is smaller than the sum of its proper divisors (36963790147040).

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

31331010121312 is a wasteful number, since it uses less digits than its factorization.

31331010121312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1328485931 (or 1328485923 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 31331010121312 its reverse (21312101013313), we get a palindrome (52643111134625).

The spelling of 31331010121312 in words is "thirty-one trillion, three hundred thirty-one billion, ten million, one hundred twenty-one thousand, three hundred twelve".