21323232233 has 2 divisors, whose sum is σ = 21323232234. Its totient is φ = 21323232232.

The previous prime is 21323232197. The next prime is 21323232241. The reversal of 21323232233 is 33223232312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18586686889 + 2736545344 = 136333^2 + 52312^2 .

It is a cyclic number.

It is not a de Polignac number, because 21323232233 - 2⁸ = 21323231977 is a prime.

It is not a weakly prime, because it can be changed into another prime (21323232263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10661616116 + 10661616117.

It is an arithmetic number, because the mean of its divisors is an integer number (10661616117).

Almost surely, 2^21323232233 is an apocalyptic number.

It is an amenable number.

21323232233 is a deficient number, since it is larger than the sum of its proper divisors (1).

21323232233 is an equidigital number, since it uses as much as digits as its factorization.

21323232233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 26.

Adding to 21323232233 its reverse (33223232312), we get a palindrome (54546464545).

The spelling of 21323232233 in words is "twenty-one billion, three hundred twenty-three million, two hundred thirty-two thousand, two hundred thirty-three".