23212323221 has 2 divisors, whose sum is σ = 23212323222. Its totient is φ = 23212323220.

The previous prime is 23212323193. The next prime is 23212323223. The reversal of 23212323221 is 12232321232.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20302260196 + 2910063025 = 142486^2 + 53945^2 .

It is a cyclic number.

It is not a de Polignac number, because 23212323221 - 2¹⁴ = 23212306837 is a prime.

Together with 23212323223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23212323223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11606161610 + 11606161611.

It is an arithmetic number, because the mean of its divisors is an integer number (11606161611).

Almost surely, 2^23212323221 is an apocalyptic number.

It is an amenable number.

23212323221 is a deficient number, since it is larger than the sum of its proper divisors (1).

23212323221 is an equidigital number, since it uses as much as digits as its factorization.

23212323221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 23.

Adding to 23212323221 its reverse (12232321232), we get a palindrome (35444644453).

The spelling of 23212323221 in words is "twenty-three billion, two hundred twelve million, three hundred twenty-three thousand, two hundred twenty-one".