31312213312020 has 96 divisors (see below), whose sum is σ = 90130440691200. Its totient is φ = 8116430045184.

The previous prime is 31312213311989. The next prime is 31312213312027. The reversal of 31312213312020 is 2021331221313.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31312213312027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4481005 + ... + 9094164.

It is an arithmetic number, because the mean of its divisors is an integer number (938858757200).

Almost surely, 2^{31312213312020} is an apocalyptic number.

31312213312020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31312213312020 is an abundant number, since it is smaller than the sum of its proper divisors (58818227379180).

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

31312213312020 is a wasteful number, since it uses less digits than its factorization.

31312213312020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13576257 (or 13576255 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 31312213312020 its reverse (2021331221313), we get a palindrome (33333544533333).

The spelling of 31312213312020 in words is "thirty-one trillion, three hundred twelve billion, two hundred thirteen million, three hundred twelve thousand, twenty".