21322123212000 has 768 divisors, whose sum is σ = 79474900377600. Its totient is φ = 4959669657600.

The previous prime is 21322123211989. The next prime is 21322123212073. The reversal of 21322123212000 is 21232122312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 212577861 + ... + 212678139.

It is an arithmetic number, because the mean of its divisors is an integer number (103482943200).

Almost surely, 2^{21322123212000} is an apocalyptic number.

21322123212000 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 21322123212000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39737450188800).

21322123212000 is an abundant number, since it is smaller than the sum of its proper divisors (58152777165600).

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

21322123212000 is a wasteful number, since it uses less digits than its factorization.

21322123212000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100396 (or 100378 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21322123212000 its reverse (21232122312), we get a palindrome (21343355334312).

The spelling of 21322123212000 in words is "twenty-one trillion, three hundred twenty-two billion, one hundred twenty-three million, two hundred twelve thousand".