31012313331020 has 96 divisors (see below), whose sum is σ = 74528471270400. Its totient is φ = 10618665041664.

The previous prime is 31012313330939. The next prime is 31012313331073. The reversal of 31012313331020 is 2013331321013.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1777914419 + ... + 1777931861.

It is an arithmetic number, because the mean of its divisors is an integer number (776338242400).

Almost surely, 2^{31012313331020} is an apocalyptic number.

It is an amenable number.

31012313331020 is an abundant number, since it is smaller than the sum of its proper divisors (43516157939380).

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

31012313331020 is a wasteful number, since it uses less digits than its factorization.

31012313331020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33607 (or 33605 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 31012313331020 its reverse (2013331321013), we get a palindrome (33025644652033).

The spelling of 31012313331020 in words is "thirty-one trillion, twelve billion, three hundred thirteen million, three hundred thirty-one thousand, twenty".