1312012213111 has 2 divisors, whose sum is σ = 1312012213112. Its totient is φ = 1312012213110.

The previous prime is 1312012213069. The next prime is 1312012213117. The reversal of 1312012213111 is 1113122102131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1312012213111 - 2²⁷ = 1311877995383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1312012213117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656006106555 + 656006106556.

It is an arithmetic number, because the mean of its divisors is an integer number (656006106556).

Almost surely, 2^{1312012213111} is an apocalyptic number.

1312012213111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312012213111 is an equidigital number, since it uses as much as digits as its factorization.

1312012213111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 1312012213111 its reverse (1113122102131), we get a palindrome (2425134315242).

The spelling of 1312012213111 in words is "one trillion, three hundred twelve billion, twelve million, two hundred thirteen thousand, one hundred eleven".