121801786400200 has 24 divisors (see below), whose sum is σ = 283189153380930. Its totient is φ = 48720714560000.

The previous prime is 121801786400143. The next prime is 121801786400269. The reversal of 121801786400200 is 2004687108121.

It can be written as a sum of positive squares in 3 ways, for example, as 92577534245284 + 29224252154916 = 9621722^2 + 5405946^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 304504465801 + ... + 304504466200.

Almost surely, 2^{121801786400200} is an apocalyptic number.

121801786400200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121801786400200 is an abundant number, since it is smaller than the sum of its proper divisors (161387366980730).

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

121801786400200 is a wasteful number, since it uses less digits than its factorization.

121801786400200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609008932017 (or 609008932008 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 40.

The spelling of 121801786400200 in words is "one hundred twenty-one trillion, eight hundred one billion, seven hundred eighty-six million, four hundred thousand, two hundred".