118556121 has 16 divisors (see below), whose sum is σ = 165150720. Its totient is φ = 75561360.

The previous prime is 118556111. The next prime is 118556129. The reversal of 118556121 is 121655811.

It is not a de Polignac number, because 118556121 - 2⁷ = 118555993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (118556129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40 + ... + 15398.

It is an arithmetic number, because the mean of its divisors is an integer number (10321920).

Almost surely, 2^118556121 is an apocalyptic number.

It is an amenable number.

118556121 is a deficient number, since it is larger than the sum of its proper divisors (46594599).

118556121 is a wasteful number, since it uses less digits than its factorization.

118556121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15476.

The product of its digits is 2400, while the sum is 30.

The square root of 118556121 is about 10888.3479463140. The cubic root of 118556121 is about 491.2561425981.

The spelling of 118556121 in words is "one hundred eighteen million, five hundred fifty-six thousand, one hundred twenty-one".