118221872 has 20 divisors (see below), whose sum is σ = 229416120. Its totient is φ = 59017728.

The previous prime is 118221871. The next prime is 118221877. The reversal of 118221872 is 278122811.

It is a happy number.

It is a super-2 number, since 2×118221872² = 27952822038368768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (118221871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5279 + ... + 16257.

It is an arithmetic number, because the mean of its divisors is an integer number (11470806).

Almost surely, 2^118221872 is an apocalyptic number.

It is an amenable number.

118221872 is a deficient number, since it is larger than the sum of its proper divisors (111194248).

118221872 is a wasteful number, since it uses less digits than its factorization.

118221872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11660 (or 11654 counting only the distinct ones).

The product of its digits is 3584, while the sum is 32.

The square root of 118221872 is about 10872.9881817281. The cubic root of 118221872 is about 490.7940367523.

The spelling of 118221872 in words is "one hundred eighteen million, two hundred twenty-one thousand, eight hundred seventy-two".