21321044322 has 16 divisors (see below), whose sum is σ = 42657367872. Its totient is φ = 7104468240.

The previous prime is 21321044287. The next prime is 21321044333. The reversal of 21321044322 is 22344012312.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21321044292 and 21321044301.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 618454 + ... + 652017.

It is an arithmetic number, because the mean of its divisors is an integer number (2666085492).

Almost surely, 2^21321044322 is an apocalyptic number.

21321044322 is an abundant number, since it is smaller than the sum of its proper divisors (21336323550).

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

21321044322 is a wasteful number, since it uses less digits than its factorization.

21321044322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1273273.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 21321044322 its reverse (22344012312), we get a palindrome (43665056634).

The spelling of 21321044322 in words is "twenty-one billion, three hundred twenty-one million, forty-four thousand, three hundred twenty-two".