21333213221323 has 4 divisors (see below), whose sum is σ = 21333490184080. Its totient is φ = 21332936258568.

The previous prime is 21333213221297. The next prime is 21333213221339. The reversal of 21333213221323 is 32312231233312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21333213221323 - 2²⁵ = 21333179666891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21333213221623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138365808 + ... + 138519901.

It is an arithmetic number, because the mean of its divisors is an integer number (5333372546020).

Almost surely, 2^{21333213221323} is an apocalyptic number.

21333213221323 is a deficient number, since it is larger than the sum of its proper divisors (276962757).

21333213221323 is an equidigital number, since it uses as much as digits as its factorization.

21333213221323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276962756.

The product of its digits is 23328, while the sum is 31.

Adding to 21333213221323 its reverse (32312231233312), we get a palindrome (53645444454635).

The spelling of 21333213221323 in words is "twenty-one trillion, three hundred thirty-three billion, two hundred thirteen million, two hundred twenty-one thousand, three hundred twenty-three".