1312202011979 has 2 divisors, whose sum is σ = 1312202011980. Its totient is φ = 1312202011978.

The previous prime is 1312202011853. The next prime is 1312202012027. The reversal of 1312202011979 is 9791102022131.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (9791102022131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1312202011979 - 2⁸ = 1312202011723 is a prime.

It is not a weakly prime, because it can be changed into another prime (1312202017979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656101005989 + 656101005990.

It is an arithmetic number, because the mean of its divisors is an integer number (656101005990).

Almost surely, 2^{1312202011979} is an apocalyptic number.

1312202011979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312202011979 is an equidigital number, since it uses as much as digits as its factorization.

1312202011979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 38.

The spelling of 1312202011979 in words is "one trillion, three hundred twelve billion, two hundred two million, eleven thousand, nine hundred seventy-nine".