21320202230221 has 16 divisors (see below), whose sum is σ = 22064556764160. Its totient is φ = 20576461259200.

The previous prime is 21320202230219. The next prime is 21320202230227. The reversal of 21320202230221 is 12203220202312.

It is a cyclic number.

It is not a de Polignac number, because 21320202230221 - 2¹ = 21320202230219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21320202230192 and 21320202230201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21320202230227) 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, 1037822676 + ... + 1037843218.

It is an arithmetic number, because the mean of its divisors is an integer number (1379034797760).

Almost surely, 2^{21320202230221} is an apocalyptic number.

It is an amenable number.

21320202230221 is a deficient number, since it is larger than the sum of its proper divisors (744354533939).

21320202230221 is a wasteful number, since it uses less digits than its factorization.

21320202230221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33716.

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

Adding to 21320202230221 its reverse (12203220202312), we get a palindrome (33523422432533).

The spelling of 21320202230221 in words is "twenty-one trillion, three hundred twenty billion, two hundred two million, two hundred thirty thousand, two hundred twenty-one".