118240221 has 16 divisors (see below), whose sum is σ = 177917760. Its totient is φ = 69189120.

The previous prime is 118240201. The next prime is 118240229. The reversal of 118240221 is 122042811.

It is not a de Polignac number, because 118240221 - 2⁷ = 118240093 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118240229) 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, 60820 + ... + 62733.

It is an arithmetic number, because the mean of its divisors is an integer number (11119860).

Almost surely, 2^118240221 is an apocalyptic number.

118240221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

118240221 is a deficient number, since it is larger than the sum of its proper divisors (59677539).

118240221 is a wasteful number, since it uses less digits than its factorization.

118240221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123596.

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 118240221 is about 10873.8319372703. The cubic root of 118240221 is about 490.8194271862.

The spelling of 118240221 in words is "one hundred eighteen million, two hundred forty thousand, two hundred twenty-one".