21222002323 has 2 divisors, whose sum is σ = 21222002324. Its totient is φ = 21222002322.

The previous prime is 21222002303. The next prime is 21222002357. The reversal of 21222002323 is 32320022212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21222002323 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21222002323.

It is not a weakly prime, because it can be changed into another prime (21222002303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611001161 + 10611001162.

It is an arithmetic number, because the mean of its divisors is an integer number (10611001162).

Almost surely, 2^21222002323 is an apocalyptic number.

21222002323 is a deficient number, since it is larger than the sum of its proper divisors (1).

21222002323 is an equidigital number, since it uses as much as digits as its factorization.

21222002323 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 21222002323 its reverse (32320022212), we get a palindrome (53542024535).

The spelling of 21222002323 in words is "twenty-one billion, two hundred twenty-two million, two thousand, three hundred twenty-three".