1113115121 has 4 divisors (see below), whose sum is σ = 1113306432. Its totient is φ = 1112923812.

The previous prime is 1113115117. The next prime is 1113115123. The reversal of 1113115121 is 1215113111.

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: 1215113111 = 83 ⋅14639917.

It is a cyclic number.

It is not a de Polignac number, because 1113115121 - 2² = 1113115117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1113115121.

It is not an unprimeable number, because it can be changed into a prime (1113115123) 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, 86645 + ... + 98658.

It is an arithmetic number, because the mean of its divisors is an integer number (278326608).

Almost surely, 2^1113115121 is an apocalyptic number.

It is an amenable number.

1113115121 is a deficient number, since it is larger than the sum of its proper divisors (191311).

1113115121 is an equidigital number, since it uses as much as digits as its factorization.

1113115121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191310.

The product of its digits is 30, while the sum is 17.

The square root of 1113115121 is about 33363.3799396884. The cubic root of 1113115121 is about 1036.3664871283.

Adding to 1113115121 its reverse (1215113111), we get a palindrome (2328228232).

The spelling of 1113115121 in words is "one billion, one hundred thirteen million, one hundred fifteen thousand, one hundred twenty-one".