111665255201 has 4 divisors (see below), whose sum is σ = 111709870272. Its totient is φ = 111620640132.

The previous prime is 111665255179. The next prime is 111665255203. The reversal of 111665255201 is 102552566111.

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 111665255201 - 2¹⁰ = 111665254177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111665255203) 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, 22303781 + ... + 22308786.

It is an arithmetic number, because the mean of its divisors is an integer number (27927467568).

Almost surely, 2^111665255201 is an apocalyptic number.

It is an amenable number.

111665255201 is a deficient number, since it is larger than the sum of its proper divisors (44615071).

111665255201 is an equidigital number, since it uses as much as digits as its factorization.

111665255201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44615070.

The product of its (nonzero) digits is 18000, while the sum is 35.

The spelling of 111665255201 in words is "one hundred eleven billion, six hundred sixty-five million, two hundred fifty-five thousand, two hundred one".