21243023144023 has 2 divisors, whose sum is σ = 21243023144024. Its totient is φ = 21243023144022.

The previous prime is 21243023144003. The next prime is 21243023144039. The reversal of 21243023144023 is 32044132034212.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21243023144023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21243023144003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10621511572011 + 10621511572012.

It is an arithmetic number, because the mean of its divisors is an integer number (10621511572012).

Almost surely, 2^{21243023144023} is an apocalyptic number.

21243023144023 is a deficient number, since it is larger than the sum of its proper divisors (1).

21243023144023 is an equidigital number, since it uses as much as digits as its factorization.

21243023144023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 31.

Adding to 21243023144023 its reverse (32044132034212), we get a palindrome (53287155178235).

The spelling of 21243023144023 in words is "twenty-one trillion, two hundred forty-three billion, twenty-three million, one hundred forty-four thousand, twenty-three".