11165056121 has 2 divisors, whose sum is σ = 11165056122. Its totient is φ = 11165056120.

The previous prime is 11165056073. The next prime is 11165056139. The reversal of 11165056121 is 12165056111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11122022521 + 43033600 = 105461^2 + 6560^2 .

It is a cyclic number.

It is not a de Polignac number, because 11165056121 - 2²⁶ = 11097947257 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (11165056921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5582528060 + 5582528061.

It is an arithmetic number, because the mean of its divisors is an integer number (5582528061).

Almost surely, 2^11165056121 is an apocalyptic number.

It is an amenable number.

11165056121 is a deficient number, since it is larger than the sum of its proper divisors (1).

11165056121 is an equidigital number, since it uses as much as digits as its factorization.

11165056121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 29.

The spelling of 11165056121 in words is "eleven billion, one hundred sixty-five million, fifty-six thousand, one hundred twenty-one".