121551201858204 has 72 divisors (see below), whose sum is σ = 307425930411600. Its totient is φ = 40494453871872.

The previous prime is 121551201858187. The next prime is 121551201858283. The reversal of 121551201858204 is 402858102155121.

121551201858204 is a `hidden beast` number, since 1 + 2 + 1 + 5 + 51 + 2 + 0 + 18 + 582 + 0 + 4 = 666.

121551201858204 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 121551201858204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1567372822 + ... + 1567450370.

It is an arithmetic number, because the mean of its divisors is an integer number (4269804589050).

Almost surely, 2^{121551201858204} is an apocalyptic number.

It is an amenable number.

121551201858204 is an abundant number, since it is smaller than the sum of its proper divisors (185874728553396).

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

121551201858204 is a wasteful number, since it uses less digits than its factorization.

121551201858204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101299 (or 101294 counting only the distinct ones).

The product of its (nonzero) digits is 256000, while the sum is 45.

The spelling of 121551201858204 in words is "one hundred twenty-one trillion, five hundred fifty-one billion, two hundred one million, eight hundred fifty-eight thousand, two hundred four".