11122211957 has 2 divisors, whose sum is σ = 11122211958. Its totient is φ = 11122211956.

The previous prime is 11122211941. The next prime is 11122211977. The reversal of 11122211957 is 75911222111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7253247556 + 3868964401 = 85166^2 + 62201^2 .

It is a cyclic number.

It is not a de Polignac number, because 11122211957 - 2⁴ = 11122211941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11122211977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5561105978 + 5561105979.

It is an arithmetic number, because the mean of its divisors is an integer number (5561105979).

Almost surely, 2^11122211957 is an apocalyptic number.

It is an amenable number.

11122211957 is a deficient number, since it is larger than the sum of its proper divisors (1).

11122211957 is an equidigital number, since it uses as much as digits as its factorization.

11122211957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2520, while the sum is 32.

The spelling of 11122211957 in words is "eleven billion, one hundred twenty-two million, two hundred eleven thousand, nine hundred fifty-seven".