31313123210112 has 32 divisors (see below), whose sum is σ = 83175483527880. Its totient is φ = 10437707736576.

The previous prime is 31313123210107. The next prime is 31313123210119. The reversal of 31313123210112 is 21101232131313.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31313123210119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40772295463 + ... + 40772296230.

Almost surely, 2^{31313123210112} is an apocalyptic number.

31313123210112 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31313123210112 is an abundant number, since it is smaller than the sum of its proper divisors (51862360317768).

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

31313123210112 is an equidigital number, since it uses as much as digits as its factorization.

31313123210112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81544591710 (or 81544591698 counting only the distinct ones).

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

Adding to 31313123210112 its reverse (21101232131313), we get a palindrome (52414355341425).

The spelling of 31313123210112 in words is "thirty-one trillion, three hundred thirteen billion, one hundred twenty-three million, two hundred ten thousand, one hundred twelve".