21323222310220 has 24 divisors (see below), whose sum is σ = 44807675094000. Its totient is φ = 8523782592192.

The previous prime is 21323222310167. The next prime is 21323222310239. The reversal of 21323222310220 is 2201322232312.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 344113990 + ... + 344175949.

It is an arithmetic number, because the mean of its divisors is an integer number (1866986462250).

Almost surely, 2^{21323222310220} is an apocalyptic number.

21323222310220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21323222310220 is an abundant number, since it is smaller than the sum of its proper divisors (23484452783780).

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

21323222310220 is a wasteful number, since it uses less digits than its factorization.

21323222310220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688291497 (or 688291495 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 21323222310220 its reverse (2201322232312), we get a palindrome (23524544542532).

The spelling of 21323222310220 in words is "twenty-one trillion, three hundred twenty-three billion, two hundred twenty-two million, three hundred ten thousand, two hundred twenty".