11521222177057 has 2 divisors, whose sum is σ = 11521222177058. Its totient is φ = 11521222177056.

The previous prime is 11521222177037. The next prime is 11521222177097. The reversal of 11521222177057 is 75077122212511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9436502028321 + 2084720148736 = 3071889^2 + 1443856^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11521222177057 is a prime.

It is a super-2 number, since 2×11521222177057² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11521222177007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5760611088528 + 5760611088529.

It is an arithmetic number, because the mean of its divisors is an integer number (5760611088529).

Almost surely, 2^{11521222177057} is an apocalyptic number.

It is an amenable number.

11521222177057 is a deficient number, since it is larger than the sum of its proper divisors (1).

11521222177057 is an equidigital number, since it uses as much as digits as its factorization.

11521222177057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 137200, while the sum is 43.

Adding to 11521222177057 its reverse (75077122212511), we get a palindrome (86598344389568).

The spelling of 11521222177057 in words is "eleven trillion, five hundred twenty-one billion, two hundred twenty-two million, one hundred seventy-seven thousand, fifty-seven".