12311321333131 has 2 divisors, whose sum is σ = 12311321333132. Its totient is φ = 12311321333130.

The previous prime is 12311321333123. The next prime is 12311321333173. The reversal of 12311321333131 is 13133312311321.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (13133312311321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12311321333131 - 2³ = 12311321333123 is a prime.

It is a super-2 number, since 2×12311321333131² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12311321333131.

It is not a weakly prime, because it can be changed into another prime (12311321133131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6155660666565 + 6155660666566.

It is an arithmetic number, because the mean of its divisors is an integer number (6155660666566).

Almost surely, 2^{12311321333131} is an apocalyptic number.

12311321333131 is a deficient number, since it is larger than the sum of its proper divisors (1).

12311321333131 is an equidigital number, since it uses as much as digits as its factorization.

12311321333131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2916, while the sum is 28.

Adding to 12311321333131 its reverse (13133312311321), we get a palindrome (25444633644452).

The spelling of 12311321333131 in words is "twelve trillion, three hundred eleven billion, three hundred twenty-one million, three hundred thirty-three thousand, one hundred thirty-one".