121806800 has 30 divisors (see below), whose sum is σ = 292641798. Its totient is φ = 48722560.

The previous prime is 121806799. The next prime is 121806823. The reversal of 121806800 is 8608121.

It can be written as a sum of positive squares in 3 ways, for example, as 1860496 + 119946304 = 1364^2 + 10952^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 121806800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 151859 + ... + 152658.

Almost surely, 2^121806800 is an apocalyptic number.

121806800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121806800 is an abundant number, since it is smaller than the sum of its proper divisors (170834998).

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

121806800 is a wasteful number, since it uses less digits than its factorization.

121806800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304535 (or 304524 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 121806800 is about 11036.6117989173. The cubic root of 121806800 is about 495.7056222332.

The spelling of 121806800 in words is "one hundred twenty-one million, eight hundred six thousand, eight hundred".