21321222320023 has 2 divisors, whose sum is σ = 21321222320024. Its totient is φ = 21321222320022.

The previous prime is 21321222319997. The next prime is 21321222320071. The reversal of 21321222320023 is 32002322212312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21321222320023 - 2³³ = 21312632385431 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21321222320023.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21321222320423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10660611160011 + 10660611160012.

It is an arithmetic number, because the mean of its divisors is an integer number (10660611160012).

Almost surely, 2^{21321222320023} is an apocalyptic number.

21321222320023 is a deficient number, since it is larger than the sum of its proper divisors (1).

21321222320023 is an equidigital number, since it uses as much as digits as its factorization.

21321222320023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 21321222320023 its reverse (32002322212312), we get a palindrome (53323544532335).

The spelling of 21321222320023 in words is "twenty-one trillion, three hundred twenty-one billion, two hundred twenty-two million, three hundred twenty thousand, twenty-three".