21323133323 has 2 divisors, whose sum is σ = 21323133324. Its totient is φ = 21323133322.

The previous prime is 21323133283. The next prime is 21323133329. The reversal of 21323133323 is 32333132312.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21323133323 - 2⁶ = 21323133259 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21323133292 and 21323133301.

It is not a weakly prime, because it can be changed into another prime (21323133329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10661566661 + 10661566662.

It is an arithmetic number, because the mean of its divisors is an integer number (10661566662).

Almost surely, 2^21323133323 is an apocalyptic number.

21323133323 is a deficient number, since it is larger than the sum of its proper divisors (1).

21323133323 is an equidigital number, since it uses as much as digits as its factorization.

21323133323 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5832, while the sum is 26.

Adding to 21323133323 its reverse (32333132312), we get a palindrome (53656265635).

The spelling of 21323133323 in words is "twenty-one billion, three hundred twenty-three million, one hundred thirty-three thousand, three hundred twenty-three".