21130023323 has 2 divisors, whose sum is σ = 21130023324. Its totient is φ = 21130023322.

The previous prime is 21130023301. The next prime is 21130023331. The reversal of 21130023323 is 32332003112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21130023323 - 2¹² = 21130019227 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21130023295 and 21130023304.

It is not a weakly prime, because it can be changed into another prime (21130023223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10565011661 + 10565011662.

It is an arithmetic number, because the mean of its divisors is an integer number (10565011662).

Almost surely, 2^21130023323 is an apocalyptic number.

21130023323 is a deficient number, since it is larger than the sum of its proper divisors (1).

21130023323 is an equidigital number, since it uses as much as digits as its factorization.

21130023323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 21130023323 its reverse (32332003112), we get a palindrome (53462026435).

The spelling of 21130023323 in words is "twenty-one billion, one hundred thirty million, twenty-three thousand, three hundred twenty-three".