121899487200 has 72 divisors (see below), whose sum is σ = 396782838648. Its totient is φ = 32506529280.

The previous prime is 121899487181. The next prime is 121899487211. The reversal of 121899487200 is 2784998121.

It is a happy number.

121899487200 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 25393327 + ... + 25398126.

It is an arithmetic number, because the mean of its divisors is an integer number (5510872759).

Almost surely, 2^121899487200 is an apocalyptic number.

121899487200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121899487200 is an abundant number, since it is smaller than the sum of its proper divisors (274883351448).

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

121899487200 is a wasteful number, since it uses less digits than its factorization.

121899487200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50791476 (or 50791463 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 51.

The spelling of 121899487200 in words is "one hundred twenty-one billion, eight hundred ninety-nine million, four hundred eighty-seven thousand, two hundred".