115516419121 has 2 divisors, whose sum is σ = 115516419122. Its totient is φ = 115516419120.

The previous prime is 115516419107. The next prime is 115516419133. The reversal of 115516419121 is 121914615511.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 105378144400 + 10138274721 = 324620^2 + 100689^2 .

It is a cyclic number.

It is not a de Polignac number, because 115516419121 - 2³⁵ = 81156680753 is a prime.

It is not a weakly prime, because it can be changed into another prime (115516419181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57758209560 + 57758209561.

It is an arithmetic number, because the mean of its divisors is an integer number (57758209561).

Almost surely, 2^115516419121 is an apocalyptic number.

It is an amenable number.

115516419121 is a deficient number, since it is larger than the sum of its proper divisors (1).

115516419121 is an equidigital number, since it uses as much as digits as its factorization.

115516419121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10800, while the sum is 37.

The spelling of 115516419121 in words is "one hundred fifteen billion, five hundred sixteen million, four hundred nineteen thousand, one hundred twenty-one".