121998902 has 32 divisors (see below), whose sum is σ = 200478240. Its totient is φ = 55457280.

The previous prime is 121998901. The next prime is 121998907. The reversal of 121998902 is 209899121.

It is a self number, because there is not a number n which added to its sum of digits gives 121998902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121998901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121868 + ... + 122864.

It is an arithmetic number, because the mean of its divisors is an integer number (6264945).

Almost surely, 2^121998902 is an apocalyptic number.

121998902 is a deficient number, since it is larger than the sum of its proper divisors (78479338).

121998902 is a wasteful number, since it uses less digits than its factorization.

121998902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1136.

The product of its (nonzero) digits is 23328, while the sum is 41.

The square root of 121998902 is about 11045.3113129508. The cubic root of 121998902 is about 495.9660784771.

The spelling of 121998902 in words is "one hundred twenty-one million, nine hundred ninety-eight thousand, nine hundred two".