21301011323 has 2 divisors, whose sum is σ = 21301011324. Its totient is φ = 21301011322.

The previous prime is 21301011289. The next prime is 21301011331. The reversal of 21301011323 is 32311010312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21301011323 - 2²⁸ = 21032575867 is a prime.

It is not a weakly prime, because it can be changed into another prime (21301011623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10650505661 + 10650505662.

It is an arithmetic number, because the mean of its divisors is an integer number (10650505662).

Almost surely, 2^21301011323 is an apocalyptic number.

21301011323 is a deficient number, since it is larger than the sum of its proper divisors (1).

21301011323 is an equidigital number, since it uses as much as digits as its factorization.

21301011323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 21301011323 its reverse (32311010312), we get a palindrome (53612021635).

The spelling of 21301011323 in words is "twenty-one billion, three hundred one million, eleven thousand, three hundred twenty-three".