115311121 has 4 divisors (see below), whose sum is σ = 120324672. Its totient is φ = 110297572.

The previous prime is 115311109. The next prime is 115311127. The reversal of 115311121 is 121113511.

It is a happy number.

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: 121113511 = 1789 ⋅67699.

It is a cyclic number.

It is not a de Polignac number, because 115311121 - 2⁵ = 115311089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 115311095 and 115311104.

It is not an unprimeable number, because it can be changed into a prime (115311127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2506741 + ... + 2506786.

It is an arithmetic number, because the mean of its divisors is an integer number (30081168).

Almost surely, 2^115311121 is an apocalyptic number.

It is an amenable number.

115311121 is a deficient number, since it is larger than the sum of its proper divisors (5013551).

115311121 is an equidigital number, since it uses as much as digits as its factorization.

115311121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5013550.

The product of its digits is 30, while the sum is 16.

The square root of 115311121 is about 10738.3015882401. The cubic root of 115311121 is about 486.7325585289.

Adding to 115311121 its reverse (121113511), we get a palindrome (236424632).

The spelling of 115311121 in words is "one hundred fifteen million, three hundred eleven thousand, one hundred twenty-one".