21213332322 has 128 divisors (see below), whose sum is σ = 55479513600. Its totient is φ = 5255663616.

The previous prime is 21213332317. The next prime is 21213332323. The reversal of 21213332322 is 22323331212.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 21213332292 and 21213332301.

It is not an unprimeable number, because it can be changed into a prime (21213332323) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 567754 + ... + 603962.

It is an arithmetic number, because the mean of its divisors is an integer number (433433700).

Almost surely, 2^21213332322 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21213332322, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27739756800).

21213332322 is an abundant number, since it is smaller than the sum of its proper divisors (34266181278).

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

21213332322 is a wasteful number, since it uses less digits than its factorization.

21213332322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36300.

The product of its digits is 2592, while the sum is 24.

Adding to 21213332322 its reverse (22323331212), we get a palindrome (43536663534).

The spelling of 21213332322 in words is "twenty-one billion, two hundred thirteen million, three hundred thirty-two thousand, three hundred twenty-two".