111051161 has 8 divisors (see below), whose sum is σ = 119811720. Its totient is φ = 102321792.

The previous prime is 111051137. The next prime is 111051163. The reversal of 111051161 is 161150111.

It can be written as a sum of positive squares in 4 ways, for example, as 1974025 + 109077136 = 1405^2 + 10444^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 111051161 - 2²² = 106856857 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (111051163) 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 7 ways as a sum of consecutive naturals, for example, 110 + ... + 14903.

It is an arithmetic number, because the mean of its divisors is an integer number (14976465).

Almost surely, 2^111051161 is an apocalyptic number.

It is an amenable number.

111051161 is a deficient number, since it is larger than the sum of its proper divisors (8760559).

111051161 is a wasteful number, since it uses less digits than its factorization.

111051161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15595.

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

The square root of 111051161 is about 10538.0814667567. The cubic root of 111051161 is about 480.6633781921.

The spelling of 111051161 in words is "one hundred eleven million, fifty-one thousand, one hundred sixty-one".