121512205200 has 60 divisors (see below), whose sum is σ = 389244101168. Its totient is φ = 32403254400.

The previous prime is 121512205193. The next prime is 121512205223. The reversal of 121512205200 is 2502215121.

It is a tau number, because it is divible by the number of its divisors (60).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50628886 + ... + 50631285.

Almost surely, 2^121512205200 is an apocalyptic number.

121512205200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121512205200 is an abundant number, since it is smaller than the sum of its proper divisors (267731895968).

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

121512205200 is a wasteful number, since it uses less digits than its factorization.

121512205200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101260192 (or 101260181 counting only the distinct ones).

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

The spelling of 121512205200 in words is "one hundred twenty-one billion, five hundred twelve million, two hundred five thousand, two hundred".