31313230322120 has 32 divisors (see below), whose sum is σ = 70512660502200. Its totient is φ = 12515000168448.

The previous prime is 31313230322071. The next prime is 31313230322131. The reversal of 31313230322120 is 2122303231313.

It can be written as a sum of positive squares in 4 ways, for example, as 21132574492324 + 10180655829796 = 4597018^2 + 3190714^2 .

It is a super-2 number, since 2×31313230322120² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31313230322120.

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, 321574475 + ... + 321671834.

Almost surely, 2^{31313230322120} is an apocalyptic number.

It is an amenable number.

31313230322120 is an abundant number, since it is smaller than the sum of its proper divisors (39199430180080).

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

31313230322120 is a wasteful number, since it uses less digits than its factorization.

31313230322120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643247537 (or 643247533 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 26.

Adding to 31313230322120 its reverse (2122303231313), we get a palindrome (33435533553433).

The spelling of 31313230322120 in words is "thirty-one trillion, three hundred thirteen billion, two hundred thirty million, three hundred twenty-two thousand, one hundred twenty".