121913858 has 16 divisors (see below), whose sum is σ = 204136416. Its totient is φ = 54126240.

The previous prime is 121913843. The next prime is 121913867. The reversal of 121913858 is 858319121.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63491 + ... + 65382.

It is an arithmetic number, because the mean of its divisors is an integer number (12758526).

Almost surely, 2^121913858 is an apocalyptic number.

121913858 is a deficient number, since it is larger than the sum of its proper divisors (82222558).

121913858 is a wasteful number, since it uses less digits than its factorization.

121913858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128929.

The product of its digits is 17280, while the sum is 38.

The square root of 121913858 is about 11041.4608634908. The cubic root of 121913858 is about 495.8508076479.

The spelling of 121913858 in words is "one hundred twenty-one million, nine hundred thirteen thousand, eight hundred fifty-eight".