121845281806400 has 168 divisors, whose sum is σ = 317366902902720. Its totient is φ = 45963127203840.

The previous prime is 121845281806349. The next prime is 121845281806403. The reversal of 121845281806400 is 4608182548121.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is not an unprimeable number, because it can be changed into a prime (121845281806403) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28539404 + ... + 32529803.

Almost surely, 2^{121845281806400} is an apocalyptic number.

121845281806400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121845281806400 is an abundant number, since it is smaller than the sum of its proper divisors (195521621096320).

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

121845281806400 is a wasteful number, since it uses less digits than its factorization.

121845281806400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61069301 (or 61069286 counting only the distinct ones).

The product of its (nonzero) digits is 983040, while the sum is 50.

The spelling of 121845281806400 in words is "one hundred twenty-one trillion, eight hundred forty-five billion, two hundred eighty-one million, eight hundred six thousand, four hundred".