115425213121 has 4 divisors (see below), whose sum is σ = 120443700672. Its totient is φ = 110406725572.

The previous prime is 115425213103. The next prime is 115425213131. The reversal of 115425213121 is 121312524511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 115425213121 - 2⁷ = 115425212993 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 115425213121.

It is not an unprimeable number, because it can be changed into a prime (115425213131) 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, 2509243741 + ... + 2509243786.

It is an arithmetic number, because the mean of its divisors is an integer number (30110925168).

Almost surely, 2^115425213121 is an apocalyptic number.

It is an amenable number.

115425213121 is a deficient number, since it is larger than the sum of its proper divisors (5018487551).

115425213121 is an equidigital number, since it uses as much as digits as its factorization.

115425213121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5018487550.

The product of its digits is 2400, while the sum is 28.

Adding to 115425213121 its reverse (121312524511), we get a palindrome (236737737632).

The spelling of 115425213121 in words is "one hundred fifteen billion, four hundred twenty-five million, two hundred thirteen thousand, one hundred twenty-one".