21220332301021 has 8 divisors (see below), whose sum is σ = 24251919105024. Its totient is φ = 18188773187280.

The previous prime is 21220332300929. The next prime is 21220332301057. The reversal of 21220332301021 is 12010323302212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21220332301021 - 2²⁹ = 21219795430109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21220332300983 and 21220332301001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220332301921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5253565 + ... + 8369026.

It is an arithmetic number, because the mean of its divisors is an integer number (3031489888128).

Almost surely, 2^{21220332301021} is an apocalyptic number.

It is an amenable number.

21220332301021 is a deficient number, since it is larger than the sum of its proper divisors (3031586804003).

21220332301021 is a wasteful number, since it uses less digits than its factorization.

21220332301021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13845131.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21220332301021 its reverse (12010323302212), we get a palindrome (33230655603233).

The spelling of 21220332301021 in words is "twenty-one trillion, two hundred twenty billion, three hundred thirty-two million, three hundred one thousand, twenty-one".