12331213231 has 2 divisors, whose sum is σ = 12331213232. Its totient is φ = 12331213230.

The previous prime is 12331213229. The next prime is 12331213241. The reversal of 12331213231 is 13231213321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12331213231 - 2¹ = 12331213229 is a prime.

It is a super-2 number, since 2×12331213231² (a number of 21 digits) contains 22 as substring.

Together with 12331213229, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12331213241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6165606615 + 6165606616.

It is an arithmetic number, because the mean of its divisors is an integer number (6165606616).

Almost surely, 2^12331213231 is an apocalyptic number.

12331213231 is a deficient number, since it is larger than the sum of its proper divisors (1).

12331213231 is an equidigital number, since it uses as much as digits as its factorization.

12331213231 is an evil number, because the sum of its binary digits is even.

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

Adding to 12331213231 its reverse (13231213321), we get a palindrome (25562426552).

The spelling of 12331213231 in words is "twelve billion, three hundred thirty-one million, two hundred thirteen thousand, two hundred thirty-one".