121551204 has 12 divisors (see below), whose sum is σ = 283619504. Its totient is φ = 40517064.

The previous prime is 121551197. The next prime is 121551229. The reversal of 121551204 is 402155121.

It is a tau number, because it is divible by the number of its divisors (12).

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, 5064622 + ... + 5064645.

Almost surely, 2^121551204 is an apocalyptic number.

It is an amenable number.

121551204 is an abundant number, since it is smaller than the sum of its proper divisors (162068300).

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

121551204 is a wasteful number, since it uses less digits than its factorization.

121551204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10129274 (or 10129272 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 121551204 is about 11025.0262584721. The cubic root of 121551204 is about 495.3586544690.

The spelling of 121551204 in words is "one hundred twenty-one million, five hundred fifty-one thousand, two hundred four".