122399188 has 12 divisors (see below), whose sum is σ = 214666452. Its totient is φ = 61065920.

The previous prime is 122399177. The next prime is 122399213. The reversal of 122399188 is 881993221.

It can be written as a sum of positive squares in 2 ways, for example, as 83685904 + 38713284 = 9148^2 + 6222^2 .

It is a super-2 number, since 2×122399188² = 29963122446118688, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31345 + ... + 35032.

It is an arithmetic number, because the mean of its divisors is an integer number (17888871).

Almost surely, 2^122399188 is an apocalyptic number.

It is an amenable number.

122399188 is a deficient number, since it is larger than the sum of its proper divisors (92267264).

122399188 is a wasteful number, since it uses less digits than its factorization.

122399188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66842 (or 66840 counting only the distinct ones).

The product of its digits is 62208, while the sum is 43.

The square root of 122399188 is about 11063.4166512882. The cubic root of 122399188 is about 496.5079181753.

The spelling of 122399188 in words is "one hundred twenty-two million, three hundred ninety-nine thousand, one hundred eighty-eight".