21323132002220 has 96 divisors (see below), whose sum is σ = 47924175364800. Its totient is φ = 7945205760000.

The previous prime is 21323132002171. The next prime is 21323132002261. The reversal of 21323132002220 is 2220023132312.

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, 69409916 + ... + 69716444.

It is an arithmetic number, because the mean of its divisors is an integer number (499210160050).

Almost surely, 2^{21323132002220} is an apocalyptic number.

21323132002220 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 21323132002220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23962087682400).

21323132002220 is an abundant number, since it is smaller than the sum of its proper divisors (26601043362580).

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

21323132002220 is a wasteful number, since it uses less digits than its factorization.

21323132002220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309619 (or 309617 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 21323132002220 its reverse (2220023132312), we get a palindrome (23543155134532).

The spelling of 21323132002220 in words is "twenty-one trillion, three hundred twenty-three billion, one hundred thirty-two million, two thousand, two hundred twenty".