1323230221 has 2 divisors, whose sum is σ = 1323230222. Its totient is φ = 1323230220.

The previous prime is 1323230219. The next prime is 1323230231. The reversal of 1323230221 is 1220323231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 741745225 + 581484996 = 27235^2 + 24114^2 .

It is an emirp because it is prime and its reverse (1220323231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1323230221 - 2¹ = 1323230219 is a prime.

Together with 1323230219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1323230201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661615110 + 661615111.

It is an arithmetic number, because the mean of its divisors is an integer number (661615111).

Almost surely, 2^1323230221 is an apocalyptic number.

It is an amenable number.

1323230221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1323230221 is an equidigital number, since it uses as much as digits as its factorization.

1323230221 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1323230221 is about 36376.2315392895. The cubic root of 1323230221 is about 1097.8553864883.

Adding to 1323230221 its reverse (1220323231), we get a palindrome (2543553452).

The spelling of 1323230221 in words is "one billion, three hundred twenty-three million, two hundred thirty thousand, two hundred twenty-one".