31331312013102 has 64 divisors (see below), whose sum is σ = 64112238696000. Its totient is φ = 10204856368128.

The previous prime is 31331312013101. The next prime is 31331312013181. The reversal of 31331312013102 is 20131021313313.

It is a super-2 number, since 2×31331312013102² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31331312013101) 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, 400468524 + ... + 400546752.

It is an arithmetic number, because the mean of its divisors is an integer number (1001753729625).

Almost surely, 2^{31331312013102} is an apocalyptic number.

31331312013102 is an abundant number, since it is smaller than the sum of its proper divisors (32780926682898).

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

31331312013102 is a wasteful number, since it uses less digits than its factorization.

31331312013102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86805.

The product of its (nonzero) digits is 972, while the sum is 24.

Adding to 31331312013102 its reverse (20131021313313), we get a palindrome (51462333326415).

The spelling of 31331312013102 in words is "thirty-one trillion, three hundred thirty-one billion, three hundred twelve million, thirteen thousand, one hundred two".