115631751121 has 4 divisors (see below), whose sum is σ = 122433618852. Its totient is φ = 108829883392.

The previous prime is 115631751107. The next prime is 115631751181. The reversal of 115631751121 is 121157136511.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 107938531600 + 7693219521 = 328540^2 + 87711^2 .

It is a cyclic number.

It is not a de Polignac number, because 115631751121 - 2⁵ = 115631751089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115631751101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3400933840 + ... + 3400933873.

It is an arithmetic number, because the mean of its divisors is an integer number (30608404713).

Almost surely, 2^115631751121 is an apocalyptic number.

It is an amenable number.

115631751121 is a deficient number, since it is larger than the sum of its proper divisors (6801867731).

115631751121 is an equidigital number, since it uses as much as digits as its factorization.

115631751121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6801867730.

The product of its digits is 6300, while the sum is 34.

Adding to 115631751121 its reverse (121157136511), we get a palindrome (236788887632).

The spelling of 115631751121 in words is "one hundred fifteen billion, six hundred thirty-one million, seven hundred fifty-one thousand, one hundred twenty-one".