121390998 has 16 divisors (see below), whose sum is σ = 244140480. Its totient is φ = 40237256.

The previous prime is 121390993. The next prime is 121391051. The reversal of 121390998 is 899093121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121390993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55440 + ... + 57587.

It is an arithmetic number, because the mean of its divisors is an integer number (15258780).

Almost surely, 2^121390998 is an apocalyptic number.

121390998 is an abundant number, since it is smaller than the sum of its proper divisors (122749482).

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

121390998 is a wasteful number, since it uses less digits than its factorization.

121390998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113211.

The product of its (nonzero) digits is 34992, while the sum is 42.

The square root of 121390998 is about 11017.7583019415. The cubic root of 121390998 is about 495.1409291618.

The spelling of 121390998 in words is "one hundred twenty-one million, three hundred ninety thousand, nine hundred ninety-eight".