115112121 has 4 divisors (see below), whose sum is σ = 153482832. Its totient is φ = 76741412.

The previous prime is 115112113. The next prime is 115112159. The reversal of 115112121 is 121211511.

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, and also an emirpimes, since its reverse is a distinct semiprime: 121211511 = 3 ⋅40403837.

It is a cyclic number.

It is not a de Polignac number, because 115112121 - 2³ = 115112113 is a prime.

It is a super-2 number, since 2×115112121² = 26501600802237282, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 115112121.

It is not an unprimeable number, because it can be changed into a prime (115113121) 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, 19185351 + ... + 19185356.

It is an arithmetic number, because the mean of its divisors is an integer number (38370708).

Almost surely, 2^115112121 is an apocalyptic number.

It is an amenable number.

115112121 is a deficient number, since it is larger than the sum of its proper divisors (38370711).

115112121 is an equidigital number, since it uses as much as digits as its factorization.

115112121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38370710.

The product of its digits is 20, while the sum is 15.

The square root of 115112121 is about 10729.0316897659. The cubic root of 115112121 is about 486.4524018221.

Adding to 115112121 its reverse (121211511), we get a palindrome (236323632).

The spelling of 115112121 in words is "one hundred fifteen million, one hundred twelve thousand, one hundred twenty-one".