21322011202221 has 32 divisors (see below), whose sum is σ = 29247520505728. Its totient is φ = 13806905414400.

The previous prime is 21322011202187. The next prime is 21322011202229. The reversal of 21322011202221 is 12220211022312.

It is not a de Polignac number, because 21322011202221 - 2¹¹ = 21322011200173 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21322011202229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 578174235 + ... + 578211111.

It is an arithmetic number, because the mean of its divisors is an integer number (913985015804).

Almost surely, 2^{21322011202221} is an apocalyptic number.

It is an amenable number.

21322011202221 is a deficient number, since it is larger than the sum of its proper divisors (7925509303507).

21322011202221 is a wasteful number, since it uses less digits than its factorization.

21322011202221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45661.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 21322011202221 its reverse (12220211022312), we get a palindrome (33542222224533).

The spelling of 21322011202221 in words is "twenty-one trillion, three hundred twenty-two billion, eleven million, two hundred two thousand, two hundred twenty-one".