31323130120 has 64 divisors (see below), whose sum is σ = 70770438720. Its totient is φ = 12477214464.

The previous prime is 31323130109. The next prime is 31323130127. The reversal of 31323130120 is 2103132313.

It is a super-2 number, since 2×31323130120² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31323130127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11569807 + ... + 11572513.

It is an arithmetic number, because the mean of its divisors is an integer number (1105788105).

Almost surely, 2^31323130120 is an apocalyptic number.

It is an amenable number.

31323130120 is an abundant number, since it is smaller than the sum of its proper divisors (39447308600).

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

31323130120 is a wasteful number, since it uses less digits than its factorization.

31323130120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3814 (or 3810 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 31323130120 its reverse (2103132313), we get a palindrome (33426262433).

The spelling of 31323130120 in words is "thirty-one billion, three hundred twenty-three million, one hundred thirty thousand, one hundred twenty".