21322512440000 has 280 divisors, whose sum is σ = 54488337188208. Its totient is φ = 8270000640000.

The previous prime is 21322512439993. The next prime is 21322512440023. The reversal of 21322512440000 is 4421522312.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 433615415 + ... + 433664585.

Almost surely, 2^{21322512440000} is an apocalyptic number.

21322512440000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21322512440000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27244168594104).

21322512440000 is an abundant number, since it is smaller than the sum of its proper divisors (33165824748208).

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

21322512440000 is an equidigital number, since it uses as much as digits as its factorization.

21322512440000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49533 (or 49508 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 21322512440000 its reverse (4421522312), we get a palindrome (21326933962312).

The spelling of 21322512440000 in words is "twenty-one trillion, three hundred twenty-two billion, five hundred twelve million, four hundred forty thousand".