21232313023 has 2 divisors, whose sum is σ = 21232313024. Its totient is φ = 21232313022.

The previous prime is 21232312993. The next prime is 21232313051. The reversal of 21232313023 is 32031323212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21232313023 - 2²¹ = 21230215871 is a prime.

It is a super-2 number, since 2×21232313023² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21232312985 and 21232313003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21232313723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10616156511 + 10616156512.

It is an arithmetic number, because the mean of its divisors is an integer number (10616156512).

Almost surely, 2^21232313023 is an apocalyptic number.

21232313023 is a deficient number, since it is larger than the sum of its proper divisors (1).

21232313023 is an equidigital number, since it uses as much as digits as its factorization.

21232313023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 21232313023 its reverse (32031323212), we get a palindrome (53263636235).

The spelling of 21232313023 in words is "twenty-one billion, two hundred thirty-two million, three hundred thirteen thousand, twenty-three".