21442301323 has 2 divisors, whose sum is σ = 21442301324. Its totient is φ = 21442301322.

The previous prime is 21442301227. The next prime is 21442301389. The reversal of 21442301323 is 32310324412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21442301323 - 2⁹ = 21442300811 is a prime.

It is not a weakly prime, because it can be changed into another prime (21442301623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10721150661 + 10721150662.

It is an arithmetic number, because the mean of its divisors is an integer number (10721150662).

Almost surely, 2^21442301323 is an apocalyptic number.

21442301323 is a deficient number, since it is larger than the sum of its proper divisors (1).

21442301323 is an equidigital number, since it uses as much as digits as its factorization.

21442301323 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 21442301323 its reverse (32310324412), we get a palindrome (53752625735).

The spelling of 21442301323 in words is "twenty-one billion, four hundred forty-two million, three hundred one thousand, three hundred twenty-three".