1115117121 has 16 divisors (see below), whose sum is σ = 1514899584. Its totient is φ = 729477504.

The previous prime is 1115117111. The next prime is 1115117123. The reversal of 1115117121 is 1217115111.

1115117121 = 183² + 184² + ... + 1496².

It is not a de Polignac number, because 1115117121 - 2⁹ = 1115116609 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1115117123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30220 + ... + 56066.

It is an arithmetic number, because the mean of its divisors is an integer number (94681224).

Almost surely, 2^1115117121 is an apocalyptic number.

It is an amenable number.

1115117121 is a deficient number, since it is larger than the sum of its proper divisors (399782463).

1115117121 is a wasteful number, since it uses less digits than its factorization.

1115117121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26120.

The product of its digits is 70, while the sum is 21.

The square root of 1115117121 is about 33393.3694166971. The cubic root of 1115117121 is about 1036.9874360983.

The spelling of 1115117121 in words is "one billion, one hundred fifteen million, one hundred seventeen thousand, one hundred twenty-one".