21021322233321 has 8 divisors (see below), whose sum is σ = 31142699604960. Its totient is φ = 14014214822196.

The previous prime is 21021322233313. The next prime is 21021322233323. The reversal of 21021322233321 is 12333222312012.

21021322233321 is a `hidden beast` number, since 2 + 1 + 0 + 2 + 1 + 322 + 2 + 3 + 332 + 1 = 666.

It is not a de Polignac number, because 21021322233321 - 2³ = 21021322233313 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 778567490123 = 21021322233321 / (2 + 1 + 0 + 2 + 1 + 3 + 2 + 2 + 2 + 3 + 3 + 3 + 2 + 1).

It is not an unprimeable number, because it can be changed into a prime (21021322233323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 389283745035 + ... + 389283745088.

It is an arithmetic number, because the mean of its divisors is an integer number (3892837450620).

Almost surely, 2^{21021322233321} is an apocalyptic number.

It is an amenable number.

21021322233321 is a deficient number, since it is larger than the sum of its proper divisors (10121377371639).

21021322233321 is an equidigital number, since it uses as much as digits as its factorization.

21021322233321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778567490132 (or 778567490126 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 21021322233321 its reverse (12333222312012), we get a palindrome (33354544545333).

The spelling of 21021322233321 in words is "twenty-one trillion, twenty-one billion, three hundred twenty-two million, two hundred thirty-three thousand, three hundred twenty-one".