1031312012111 has 2 divisors, whose sum is σ = 1031312012112. Its totient is φ = 1031312012110.

The previous prime is 1031312012063. The next prime is 1031312012149. The reversal of 1031312012111 is 1112102131301.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1031312012111 - 2²² = 1031307817807 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1031312012111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1031312012911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 515656006055 + 515656006056.

It is an arithmetic number, because the mean of its divisors is an integer number (515656006056).

Almost surely, 2^{1031312012111} is an apocalyptic number.

1031312012111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1031312012111 is an equidigital number, since it uses as much as digits as its factorization.

1031312012111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 1031312012111 its reverse (1112102131301), we get a palindrome (2143414143412).

The spelling of 1031312012111 in words is "one trillion, thirty-one billion, three hundred twelve million, twelve thousand, one hundred eleven".