1311265401311 has 2 divisors, whose sum is σ = 1311265401312. Its totient is φ = 1311265401310.

The previous prime is 1311265401269. The next prime is 1311265401343. The reversal of 1311265401311 is 1131045621131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1311265401311 - 2³⁰ = 1310191659487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311265401211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655632700655 + 655632700656.

It is an arithmetic number, because the mean of its divisors is an integer number (655632700656).

Almost surely, 2^{1311265401311} is an apocalyptic number.

1311265401311 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311265401311 is an equidigital number, since it uses as much as digits as its factorization.

1311265401311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 29.

The spelling of 1311265401311 in words is "one trillion, three hundred eleven billion, two hundred sixty-five million, four hundred one thousand, three hundred eleven".