111867201 has 6 divisors (see below), whose sum is σ = 161585970. Its totient is φ = 74578128.

The previous prime is 111867179. The next prime is 111867221. The reversal of 111867201 is 102768111.

It can be written as a sum of positive squares in only one way, i.e., 108180801 + 3686400 = 10401^2 + 1920^2 .

It is not a de Polignac number, because 111867201 - 2⁶ = 111867137 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (111867221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6214836 + ... + 6214853.

It is an arithmetic number, because the mean of its divisors is an integer number (26930995).

Almost surely, 2^111867201 is an apocalyptic number.

It is an amenable number.

111867201 is a deficient number, since it is larger than the sum of its proper divisors (49718769).

111867201 is a wasteful number, since it uses less digits than its factorization.

111867201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12429695 (or 12429692 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 27.

The square root of 111867201 is about 10576.7292203214. The cubic root of 111867201 is about 481.8378629144.

The spelling of 111867201 in words is "one hundred eleven million, eight hundred sixty-seven thousand, two hundred one".