118166751021 has 16 divisors (see below), whose sum is σ = 179351907840. Its totient is φ = 68502463920.

The previous prime is 118166750981. The next prime is 118166751023. The reversal of 118166751021 is 120157661811.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-118166751021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118166751023) 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, 77842951 + ... + 77844468.

It is an arithmetic number, because the mean of its divisors is an integer number (11209494240).

Almost surely, 2^118166751021 is an apocalyptic number.

118166751021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

118166751021 is a deficient number, since it is larger than the sum of its proper divisors (61185156819).

118166751021 is a wasteful number, since it uses less digits than its factorization.

118166751021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155687456.

The product of its (nonzero) digits is 20160, while the sum is 39.

The spelling of 118166751021 in words is "one hundred eighteen billion, one hundred sixty-six million, seven hundred fifty-one thousand, twenty-one".