12311031020 has 48 divisors (see below), whose sum is σ = 25984899360. Its totient is φ = 4899385344.

The previous prime is 12311030993. The next prime is 12311031043. The reversal of 12311031020 is 2013011321.

It is a super-2 number, since 2×12311031020² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12311030986 and 12311031004.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3922892 + ... + 3926028.

It is an arithmetic number, because the mean of its divisors is an integer number (541352070).

Almost surely, 2^12311031020 is an apocalyptic number.

12311031020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12311031020 is an abundant number, since it is smaller than the sum of its proper divisors (13673868340).

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

12311031020 is a wasteful number, since it uses less digits than its factorization.

12311031020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4082 (or 4080 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 12311031020 its reverse (2013011321), we get a palindrome (14324042341).

The spelling of 12311031020 in words is "twelve billion, three hundred eleven million, thirty-one thousand, twenty".