21022020223321 has 24 divisors (see below), whose sum is σ = 22884486375960. Its totient is φ = 19301956876800.

The previous prime is 21022020223297. The next prime is 21022020223403. The reversal of 21022020223321 is 12332202022012.

It can be written as a sum of positive squares in 12 ways, for example, as 8217510224400 + 12804509998921 = 2866620^2 + 3578339^2 .

It is not a de Polignac number, because 21022020223321 - 2²⁵ = 21021986668889 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21022020223292 and 21022020223301.

It is not an unprimeable number, because it can be changed into a prime (21022020223921) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40805781 + ... + 41317741.

It is an arithmetic number, because the mean of its divisors is an integer number (953520265665).

Almost surely, 2^{21022020223321} is an apocalyptic number.

It is an amenable number.

21022020223321 is a deficient number, since it is larger than the sum of its proper divisors (1862466152639).

21022020223321 is a wasteful number, since it uses less digits than its factorization.

21022020223321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513277 (or 513264 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 21022020223321 its reverse (12332202022012), we get a palindrome (33354222245333).

The spelling of 21022020223321 in words is "twenty-one trillion, twenty-two billion, twenty million, two hundred twenty-three thousand, three hundred twenty-one".