131212132331 has 12 divisors (see below), whose sum is σ = 152807823000. Its totient is φ = 112339846080.

The previous prime is 131212132309. The next prime is 131212132411. The reversal of 131212132331 is 133231212131.

It is not a de Polignac number, because 131212132331 - 2²² = 131207938027 is a prime.

It is a super-2 number, since 2×131212132331² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 131212132297 and 131212132306.

It is not an unprimeable number, because it can be changed into a prime (131212132031) 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, 1476581 + ... + 1562918.

It is an arithmetic number, because the mean of its divisors is an integer number (12733985250).

Almost surely, 2^131212132331 is an apocalyptic number.

131212132331 is a deficient number, since it is larger than the sum of its proper divisors (21595690669).

131212132331 is an equidigital number, since it uses as much as digits as its factorization.

131212132331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3040394 (or 3040387 counting only the distinct ones).

The product of its digits is 648, while the sum is 23.

Adding to 131212132331 its reverse (133231212131), we get a palindrome (264443344462).

The spelling of 131212132331 in words is "one hundred thirty-one billion, two hundred twelve million, one hundred thirty-two thousand, three hundred thirty-one".