118550111 has 4 divisors (see below), whose sum is σ = 118572000. Its totient is φ = 118528224.

The previous prime is 118550099. The next prime is 118550123. The reversal of 118550111 is 111055811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111055811 = 2141 ⋅51871.

It is an interprime number because it is at equal distance from previous prime (118550099) and next prime (118550123).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-118550111 is a prime.

It is a super-2 number, since 2×118550111² = 28108257636224642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118550141) 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, 3815 + ... + 15863.

It is an arithmetic number, because the mean of its divisors is an integer number (29643000).

Almost surely, 2^118550111 is an apocalyptic number.

118550111 is a deficient number, since it is larger than the sum of its proper divisors (21889).

118550111 is an equidigital number, since it uses as much as digits as its factorization.

118550111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21888.

The product of its (nonzero) digits is 200, while the sum is 23.

The square root of 118550111 is about 10888.0719597181. The cubic root of 118550111 is about 491.2478413276.

The spelling of 118550111 in words is "one hundred eighteen million, five hundred fifty thousand, one hundred eleven".