21220322030421 has 16 divisors (see below), whose sum is σ = 28918162848960. Its totient is φ = 13838056419200.

The previous prime is 21220322030399. The next prime is 21220322030449. The reversal of 21220322030421 is 12403022302212.

It is a cyclic number.

It is not a de Polignac number, because 21220322030421 - 2⁶ = 21220322030357 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21220322030391 and 21220322030400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220322030321) 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, 421866816 + ... + 421917113.

It is an arithmetic number, because the mean of its divisors is an integer number (1807385178060).

Almost surely, 2^{21220322030421} is an apocalyptic number.

It is an amenable number.

21220322030421 is a deficient number, since it is larger than the sum of its proper divisors (7697840818539).

21220322030421 is a wasteful number, since it uses less digits than its factorization.

21220322030421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 843784116.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 21220322030421 its reverse (12403022302212), we get a palindrome (33623344332633).

The spelling of 21220322030421 in words is "twenty-one trillion, two hundred twenty billion, three hundred twenty-two million, thirty thousand, four hundred twenty-one".