21310230023 has 2 divisors, whose sum is σ = 21310230024. Its totient is φ = 21310230022.

The previous prime is 21310229989. The next prime is 21310230037. The reversal of 21310230023 is 32003201312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21310230023 - 2¹⁰ = 21310228999 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21310229983 and 21310230010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21310230323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10655115011 + 10655115012.

It is an arithmetic number, because the mean of its divisors is an integer number (10655115012).

Almost surely, 2^21310230023 is an apocalyptic number.

21310230023 is a deficient number, since it is larger than the sum of its proper divisors (1).

21310230023 is an equidigital number, since it uses as much as digits as its factorization.

21310230023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21310230023 its reverse (32003201312), we get a palindrome (53313431335).

The spelling of 21310230023 in words is "twenty-one billion, three hundred ten million, two hundred thirty thousand, twenty-three".