31311122012311 has 2 divisors, whose sum is σ = 31311122012312. Its totient is φ = 31311122012310.

The previous prime is 31311122012279. The next prime is 31311122012327. The reversal of 31311122012311 is 11321022111313.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31311122012311 - 2⁵ = 31311122012279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31311122016311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15655561006155 + 15655561006156.

It is an arithmetic number, because the mean of its divisors is an integer number (15655561006156).

Almost surely, 2^{31311122012311} is an apocalyptic number.

31311122012311 is a deficient number, since it is larger than the sum of its proper divisors (1).

31311122012311 is an equidigital number, since it uses as much as digits as its factorization.

31311122012311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 22.

Adding to 31311122012311 its reverse (11321022111313), we get a palindrome (42632144123624).

The spelling of 31311122012311 in words is "thirty-one trillion, three hundred eleven billion, one hundred twenty-two million, twelve thousand, three hundred eleven".