121199998 has 8 divisors (see below), whose sum is σ = 182215440. Its totient is φ = 60461520.

The previous prime is 121199989. The next prime is 121200011. The reversal of 121199998 is 899991121.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 68143 + ... + 69898.

It is an arithmetic number, because the mean of its divisors is an integer number (22776930).

Almost surely, 2^121199998 is an apocalyptic number.

121199998 is a deficient number, since it is larger than the sum of its proper divisors (61015442).

121199998 is a wasteful number, since it uses less digits than its factorization.

121199998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138482.

The product of its digits is 104976, while the sum is 49.

The square root of 121199998 is about 11009.0870647843. The cubic root of 121199998 is about 494.8811033011.

The spelling of 121199998 in words is "one hundred twenty-one million, one hundred ninety-nine thousand, nine hundred ninety-eight".