21302013321223 has 2 divisors, whose sum is σ = 21302013321224. Its totient is φ = 21302013321222.

The previous prime is 21302013321217. The next prime is 21302013321247. The reversal of 21302013321223 is 32212331020312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21302013321223 - 2⁹ = 21302013320711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21302013301223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10651006660611 + 10651006660612.

It is an arithmetic number, because the mean of its divisors is an integer number (10651006660612).

Almost surely, 2^{21302013321223} is an apocalyptic number.

21302013321223 is a deficient number, since it is larger than the sum of its proper divisors (1).

21302013321223 is an equidigital number, since it uses as much as digits as its factorization.

21302013321223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 21302013321223 its reverse (32212331020312), we get a palindrome (53514344341535).

The spelling of 21302013321223 in words is "twenty-one trillion, three hundred two billion, thirteen million, three hundred twenty-one thousand, two hundred twenty-three".