118118421 has 24 divisors (see below), whose sum is σ = 185796000. Its totient is φ = 72025632.

The previous prime is 118118381. The next prime is 118118437. The reversal of 118118421 is 124811811.

It is not a de Polignac number, because 118118421 - 2⁷ = 118118293 is a prime.

It is a super-2 number, since 2×118118421² = 27903922759066482, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118118461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6951 + ... + 16868.

It is an arithmetic number, because the mean of its divisors is an integer number (7741500).

Almost surely, 2^118118421 is an apocalyptic number.

It is an amenable number.

118118421 is a deficient number, since it is larger than the sum of its proper divisors (67677579).

118118421 is a wasteful number, since it uses less digits than its factorization.

118118421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23873 (or 23870 counting only the distinct ones).

The product of its digits is 512, while the sum is 27.

The square root of 118118421 is about 10868.2298926734. The cubic root of 118118421 is about 490.6508372183.

The spelling of 118118421 in words is "one hundred eighteen million, one hundred eighteen thousand, four hundred twenty-one".