121900224 has 56 divisors (see below), whose sum is σ = 333664560. Its totient is φ = 39230464.

The previous prime is 121900213. The next prime is 121900243. The reversal of 121900224 is 422009121.

It is a super-2 number, since 2×121900224² = 29719329222500352, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121900224.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5379 + ... + 16514.

Almost surely, 2^121900224 is an apocalyptic number.

It is an amenable number.

121900224 is an abundant number, since it is smaller than the sum of its proper divisors (211764336).

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

121900224 is a wasteful number, since it uses less digits than its factorization.

121900224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21937 (or 21927 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 121900224 is about 11040.8434460416. The cubic root of 121900224 is about 495.8323227874.

Adding to 121900224 its reverse (422009121), we get a palindrome (543909345).

The spelling of 121900224 in words is "one hundred twenty-one million, nine hundred thousand, two hundred twenty-four".