121999976 has 16 divisors (see below), whose sum is σ = 261428640. Its totient is φ = 52285680.

The previous prime is 121999967. The next prime is 121999991. The reversal of 121999976 is 679999121.

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, 1089230 + ... + 1089341.

It is an arithmetic number, because the mean of its divisors is an integer number (16339290).

Almost surely, 2^121999976 is an apocalyptic number.

It is an amenable number.

121999976 is an abundant number, since it is smaller than the sum of its proper divisors (139428664).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121999976 is a wasteful number, since it uses less digits than its factorization.

121999976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2178584 (or 2178580 counting only the distinct ones).

The product of its digits is 551124, while the sum is 53.

The square root of 121999976 is about 11045.3599307583. The cubic root of 121999976 is about 495.9675338618.

The spelling of 121999976 in words is "one hundred twenty-one million, nine hundred ninety-nine thousand, nine hundred seventy-six".