12131322331 has 12 divisors (see below), whose sum is σ = 13360097232. Its totient is φ = 10993135824.

The previous prime is 12131322323. The next prime is 12131322367. The reversal of 12131322331 is 13322313121.

It is not a de Polignac number, because 12131322331 - 2³ = 12131322323 is a prime.

It is a super-2 number, since 2×12131322331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12131325331) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 722236 + ... + 738841.

It is an arithmetic number, because the mean of its divisors is an integer number (1113341436).

Almost surely, 2^12131322331 is an apocalyptic number.

12131322331 is a deficient number, since it is larger than the sum of its proper divisors (1228774901).

12131322331 is a wasteful number, since it uses less digits than its factorization.

12131322331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1461138 (or 1461119 counting only the distinct ones).

The product of its digits is 648, while the sum is 22.

Adding to 12131322331 its reverse (13322313121), we get a palindrome (25453635452).

The spelling of 12131322331 in words is "twelve billion, one hundred thirty-one million, three hundred twenty-two thousand, three hundred thirty-one".