1311056530369 has 2 divisors, whose sum is σ = 1311056530370. Its totient is φ = 1311056530368.

The previous prime is 1311056530363. The next prime is 1311056530411. The reversal of 1311056530369 is 9630356501131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1176302930625 + 134753599744 = 1084575^2 + 367088^2 .

It is an emirp because it is prime and its reverse (9630356501131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1311056530369 - 2⁹ = 1311056529857 is a prime.

It is a super-2 number, since 2×1311056530369² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1311056530363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655528265184 + 655528265185.

It is an arithmetic number, because the mean of its divisors is an integer number (655528265185).

Almost surely, 2^{1311056530369} is an apocalyptic number.

It is an amenable number.

1311056530369 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311056530369 is an equidigital number, since it uses as much as digits as its factorization.

1311056530369 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 218700, while the sum is 43.

The spelling of 1311056530369 in words is "one trillion, three hundred eleven billion, fifty-six million, five hundred thirty thousand, three hundred sixty-nine".