121598220 has 48 divisors (see below), whose sum is σ = 343617120. Its totient is φ = 32126976.

The previous prime is 121598219. The next prime is 121598339. The reversal of 121598220 is 22895121.

It is a super-2 number, since 2×121598220² = 29572254214336800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2757 + ... + 15836.

It is an arithmetic number, because the mean of its divisors is an integer number (7158690).

Almost surely, 2^121598220 is an apocalyptic number.

121598220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121598220 is an abundant number, since it is smaller than the sum of its proper divisors (222018900).

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

121598220 is a wasteful number, since it uses less digits than its factorization.

121598220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18714 (or 18712 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 121598220 is about 11027.1582921440. The cubic root of 121598220 is about 495.4225144708.

The spelling of 121598220 in words is "one hundred twenty-one million, five hundred ninety-eight thousand, two hundred twenty".