21222144323 has 2 divisors, whose sum is σ = 21222144324. Its totient is φ = 21222144322.

The previous prime is 21222144319. The next prime is 21222144329. The reversal of 21222144323 is 32344122212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21222144323 - 2² = 21222144319 is a prime.

It is a super-2 number, since 2×21222144323² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 21222144292 and 21222144301.

It is not a weakly prime, because it can be changed into another prime (21222144329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611072161 + 10611072162.

It is an arithmetic number, because the mean of its divisors is an integer number (10611072162).

Almost surely, 2^21222144323 is an apocalyptic number.

21222144323 is a deficient number, since it is larger than the sum of its proper divisors (1).

21222144323 is an equidigital number, since it uses as much as digits as its factorization.

21222144323 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4608, while the sum is 26.

Adding to 21222144323 its reverse (32344122212), we get a palindrome (53566266535).

The spelling of 21222144323 in words is "twenty-one billion, two hundred twenty-two million, one hundred forty-four thousand, three hundred twenty-three".