21322023213220 has 48 divisors (see below), whose sum is σ = 44856318886848. Its totient is φ = 8513567694720.

The previous prime is 21322023213199. The next prime is 21322023213223. The reversal of 21322023213220 is 2231232022312.

It is not an unprimeable number, because it can be changed into a prime (21322023213223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34452147 + ... + 35065573.

It is an arithmetic number, because the mean of its divisors is an integer number (934506643476).

Almost surely, 2^{21322023213220} is an apocalyptic number.

21322023213220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21322023213220 is an abundant number, since it is smaller than the sum of its proper divisors (23534295673628).

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

21322023213220 is a wasteful number, since it uses less digits than its factorization.

21322023213220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616540 (or 616538 counting only the distinct ones).

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

Adding to 21322023213220 its reverse (2231232022312), we get a palindrome (23553255235532).

The spelling of 21322023213220 in words is "twenty-one trillion, three hundred twenty-two billion, twenty-three million, two hundred thirteen thousand, two hundred twenty".