21022331023 has 2 divisors, whose sum is σ = 21022331024. Its totient is φ = 21022331022.

The previous prime is 21022331009. The next prime is 21022331047. The reversal of 21022331023 is 32013322012.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21022331023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21022361023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511165511 + 10511165512.

It is an arithmetic number, because the mean of its divisors is an integer number (10511165512).

Almost surely, 2^21022331023 is an apocalyptic number.

21022331023 is a deficient number, since it is larger than the sum of its proper divisors (1).

21022331023 is an equidigital number, since it uses as much as digits as its factorization.

21022331023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21022331023 its reverse (32013322012), we get a palindrome (53035653035).

The spelling of 21022331023 in words is "twenty-one billion, twenty-two million, three hundred thirty-one thousand, twenty-three".