121297644800 has 54 divisors (see below), whose sum is σ = 300230639478. Its totient is φ = 48519055360.

The previous prime is 121297644779. The next prime is 121297644851. The reversal of 121297644800 is 8446792121.

It can be written as a sum of positive squares in 3 ways, for example, as 405136384 + 120892508416 = 20128^2 + 347696^2 .

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, 9469979 + ... + 9482778.

It is an arithmetic number, because the mean of its divisors is an integer number (5559826657).

Almost surely, 2^121297644800 is an apocalyptic number.

121297644800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121297644800 is an abundant number, since it is smaller than the sum of its proper divisors (178932994678).

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

121297644800 is an equidigital number, since it uses as much as digits as its factorization.

121297644800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18952783 (or 18952764 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 44.

The spelling of 121297644800 in words is "one hundred twenty-one billion, two hundred ninety-seven million, six hundred forty-four thousand, eight hundred".