1232320321 has 2 divisors, whose sum is σ = 1232320322. Its totient is φ = 1232320320.

The previous prime is 1232320303. The next prime is 1232320351. The reversal of 1232320321 is 1230232321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1218777921 + 13542400 = 34911^2 + 3680^2 .

It is an emirp because it is prime and its reverse (1230232321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1232320321 - 2²⁹ = 695449409 is a prime.

It is a super-2 number, since 2×1232320321² = 3037226747099086082, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1232320351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 616160160 + 616160161.

It is an arithmetic number, because the mean of its divisors is an integer number (616160161).

Almost surely, 2^1232320321 is an apocalyptic number.

It is an amenable number.

1232320321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1232320321 is an equidigital number, since it uses as much as digits as its factorization.

1232320321 is an evil number, because the sum of its binary digits is even.

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

The square root of 1232320321 is about 35104.4202487379. The cubic root of 1232320321 is about 1072.1145829780.

Adding to 1232320321 its reverse (1230232321), we get a palindrome (2462552642).

The spelling of 1232320321 in words is "one billion, two hundred thirty-two million, three hundred twenty thousand, three hundred twenty-one".