1115117321 has 4 divisors (see below), whose sum is σ = 1115229312. Its totient is φ = 1115005332.

The previous prime is 1115117293. The next prime is 1115117351. The reversal of 1115117321 is 1237115111.

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 1115117321 - 2³⁰ = 41375497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1115117351) 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, 39425 + ... + 61518.

It is an arithmetic number, because the mean of its divisors is an integer number (278807328).

Almost surely, 2^1115117321 is an apocalyptic number.

It is an amenable number.

1115117321 is a deficient number, since it is larger than the sum of its proper divisors (111991).

1115117321 is a wasteful number, since it uses less digits than its factorization.

1115117321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111990.

The product of its digits is 210, while the sum is 23.

The square root of 1115117321 is about 33393.3724113034. The cubic root of 1115117321 is about 1036.9874980941.

The spelling of 1115117321 in words is "one billion, one hundred fifteen million, one hundred seventeen thousand, three hundred twenty-one".