21213320323332 has 48 divisors (see below), whose sum is σ = 49616927986752. Its totient is φ = 7054085775360.

The previous prime is 21213320323301. The next prime is 21213320323379. The reversal of 21213320323332 is 23332302331212.

It is a self number, because there is not a number n which added to its sum of digits gives 21213320323332.

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 15 ways as a sum of consecutive naturals, for example, 35517732 + ... + 36110052.

It is an arithmetic number, because the mean of its divisors is an integer number (1033685999724).

Almost surely, 2^{21213320323332} is an apocalyptic number.

It is an amenable number.

21213320323332 is an abundant number, since it is smaller than the sum of its proper divisors (28403607663420).

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

21213320323332 is a wasteful number, since it uses less digits than its factorization.

21213320323332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599508 (or 599506 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 30.

Adding to 21213320323332 its reverse (23332302331212), we get a palindrome (44545622654544).

The spelling of 21213320323332 in words is "twenty-one trillion, two hundred thirteen billion, three hundred twenty million, three hundred twenty-three thousand, three hundred thirty-two".