121918828 has 12 divisors (see below), whose sum is σ = 216542872. Its totient is φ = 60049440.

The previous prime is 121918807. The next prime is 121918831. The reversal of 121918828 is 828819121.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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, 227193 + ... + 227728.

Almost surely, 2^121918828 is an apocalyptic number.

It is an amenable number.

121918828 is a deficient number, since it is larger than the sum of its proper divisors (94624044).

121918828 is a wasteful number, since it uses less digits than its factorization.

121918828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454992 (or 454990 counting only the distinct ones).

The product of its digits is 18432, while the sum is 40.

The square root of 121918828 is about 11041.6859219958. The cubic root of 121918828 is about 495.8575455885.

The spelling of 121918828 in words is "one hundred twenty-one million, nine hundred eighteen thousand, eight hundred twenty-eight".