21230212221223 has 2 divisors, whose sum is σ = 21230212221224. Its totient is φ = 21230212221222.

The previous prime is 21230212221193. The next prime is 21230212221293. The reversal of 21230212221223 is 32212221203212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21230212221223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21230212221293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10615106110611 + 10615106110612.

It is an arithmetic number, because the mean of its divisors is an integer number (10615106110612).

Almost surely, 2^{21230212221223} is an apocalyptic number.

21230212221223 is a deficient number, since it is larger than the sum of its proper divisors (1).

21230212221223 is an equidigital number, since it uses as much as digits as its factorization.

21230212221223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 21230212221223 its reverse (32212221203212), we get a palindrome (53442433424435).

The spelling of 21230212221223 in words is "twenty-one trillion, two hundred thirty billion, two hundred twelve million, two hundred twenty-one thousand, two hundred twenty-three".