21222331223 has 2 divisors, whose sum is σ = 21222331224. Its totient is φ = 21222331222.

The previous prime is 21222331187. The next prime is 21222331231. The reversal of 21222331223 is 32213322212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21222331223 - 2²⁶ = 21155222359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21222331243) 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, 10611165611 + 10611165612.

It is an arithmetic number, because the mean of its divisors is an integer number (10611165612).

Almost surely, 2^21222331223 is an apocalyptic number.

21222331223 is a deficient number, since it is larger than the sum of its proper divisors (1).

21222331223 is an equidigital number, since it uses as much as digits as its factorization.

21222331223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 23.

Adding to 21222331223 its reverse (32213322212), we get a palindrome (53435653435).

The spelling of 21222331223 in words is "twenty-one billion, two hundred twenty-two million, three hundred thirty-one thousand, two hundred twenty-three".