21232103332220 has 96 divisors (see below), whose sum is σ = 49371922414080. Its totient is φ = 7604740535040.

The previous prime is 21232103332169. The next prime is 21232103332261. The reversal of 21232103332220 is 2223330123212.

It is a self number, because there is not a number n which added to its sum of digits gives 21232103332220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 152592641 + ... + 152731719.

It is an arithmetic number, because the mean of its divisors is an integer number (514290858480).

Almost surely, 2^{21232103332220} is an apocalyptic number.

21232103332220 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 21232103332220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24685961207040).

21232103332220 is an abundant number, since it is smaller than the sum of its proper divisors (28139819081860).

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

21232103332220 is a wasteful number, since it uses less digits than its factorization.

21232103332220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149523 (or 149521 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 26.

Adding to 21232103332220 its reverse (2223330123212), we get a palindrome (23455433455432).

The spelling of 21232103332220 in words is "twenty-one trillion, two hundred thirty-two billion, one hundred three million, three hundred thirty-two thousand, two hundred twenty".