111606107711721 has 32 divisors (see below), whose sum is σ = 187899504703488. Its totient is φ = 57413737539840.

The previous prime is 111606107711669. The next prime is 111606107711771. The reversal of 111606107711721 is 127117701606111.

It is a happy number.

It is not a de Polignac number, because 111606107711721 - 2¹⁵ = 111606107678953 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (111606107711771) 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, 6796125495 + ... + 6796141916.

It is an arithmetic number, because the mean of its divisors is an integer number (5871859521984).

Almost surely, 2^{111606107711721} is an apocalyptic number.

It is an amenable number.

111606107711721 is a deficient number, since it is larger than the sum of its proper divisors (76293396991767).

111606107711721 is a wasteful number, since it uses less digits than its factorization.

111606107711721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13592267461.

The product of its (nonzero) digits is 24696, while the sum is 42.

The spelling of 111606107711721 in words is "one hundred eleven trillion, six hundred six billion, one hundred seven million, seven hundred eleven thousand, seven hundred twenty-one".