12311031213 has 32 divisors (see below), whose sum is σ = 19649952000. Its totient is φ = 7572771648.

The previous prime is 12311031181. The next prime is 12311031217. The reversal of 12311031213 is 31213011321.

It is not a de Polignac number, because 12311031213 - 2⁵ = 12311031181 is a prime.

It is a super-2 number, since 2×12311031213² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12311031217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1007263 + ... + 1019411.

It is an arithmetic number, because the mean of its divisors is an integer number (614061000).

Almost surely, 2^12311031213 is an apocalyptic number.

12311031213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

12311031213 is a deficient number, since it is larger than the sum of its proper divisors (7338920787).

12311031213 is a wasteful number, since it uses less digits than its factorization.

12311031213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15058 (or 15052 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 12311031213 its reverse (31213011321), we get a palindrome (43524042534).

The spelling of 12311031213 in words is "twelve billion, three hundred eleven million, thirty-one thousand, two hundred thirteen".