21023331023 has 2 divisors, whose sum is σ = 21023331024. Its totient is φ = 21023331022.

The previous prime is 21023330989. The next prime is 21023331037. The reversal of 21023331023 is 32013332012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21023331023 - 2²⁰ = 21022282447 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21023330986 and 21023331004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21023331053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511665511 + 10511665512.

It is an arithmetic number, because the mean of its divisors is an integer number (10511665512).

Almost surely, 2^21023331023 is an apocalyptic number.

21023331023 is a deficient number, since it is larger than the sum of its proper divisors (1).

21023331023 is an equidigital number, since it uses as much as digits as its factorization.

21023331023 is an evil number, because the sum of its binary digits is even.

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

Adding to 21023331023 its reverse (32013332012), we get a palindrome (53036663035).

The spelling of 21023331023 in words is "twenty-one billion, twenty-three million, three hundred thirty-one thousand, twenty-three".