12311031320 has 64 divisors (see below), whose sum is σ = 31807123200. Its totient is φ = 4200900480.

The previous prime is 12311031307. The next prime is 12311031331. The reversal of 12311031320 is 2313011321.

It is a super-2 number, since 2×12311031320² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 45110 + ... + 163269.

It is an arithmetic number, because the mean of its divisors is an integer number (496986300).

Almost surely, 2^12311031320 is an apocalyptic number.

12311031320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12311031320 is an abundant number, since it is smaller than the sum of its proper divisors (19496091880).

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

12311031320 is a wasteful number, since it uses less digits than its factorization.

12311031320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208608 (or 208604 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 12311031320 its reverse (2313011321), we get a palindrome (14624042641).

The spelling of 12311031320 in words is "twelve billion, three hundred eleven million, thirty-one thousand, three hundred twenty".