921222025280 has 56 divisors (see below), whose sum is σ = 2194120524120. Its totient is φ = 368411443200.

The previous prime is 921222025279. The next prime is 921222025303. The reversal of 921222025280 is 82520222129.

It can be written as a sum of positive squares in 4 ways, for example, as 7408389184 + 913813636096 = 86072^2 + 955936^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 921222025280.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1236506 + ... + 1836134.

It is an arithmetic number, because the mean of its divisors is an integer number (39180723645).

Almost surely, 2^921222025280 is an apocalyptic number.

It is an amenable number.

921222025280 is an abundant number, since it is smaller than the sum of its proper divisors (1272898498840).

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

921222025280 is a wasteful number, since it uses less digits than its factorization.

921222025280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604447 (or 604437 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 35.

The spelling of 921222025280 in words is "nine hundred twenty-one billion, two hundred twenty-two million, twenty-five thousand, two hundred eighty".