111225637161 has 32 divisors (see below), whose sum is σ = 167521639040. Its totient is φ = 72916718400.

The previous prime is 111225637153. The next prime is 111225637177. The reversal of 111225637161 is 161736522111.

111225637161 is a `hidden beast` number, since 1 + 1 + 1 + 2 + 2 + 5 + 637 + 16 + 1 = 666.

It is not a de Polignac number, because 111225637161 - 2³ = 111225637153 is a prime.

It is a super-2 number, since 2×111225637161² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111225637181) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11015031 + ... + 11025123.

It is an arithmetic number, because the mean of its divisors is an integer number (5235051220).

Almost surely, 2^111225637161 is an apocalyptic number.

It is an amenable number.

111225637161 is a deficient number, since it is larger than the sum of its proper divisors (56296001879).

111225637161 is a wasteful number, since it uses less digits than its factorization.

111225637161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16854 (or 16848 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The spelling of 111225637161 in words is "one hundred eleven billion, two hundred twenty-five million, six hundred thirty-seven thousand, one hundred sixty-one".