22222232321 has 2 divisors, whose sum is σ = 22222232322. Its totient is φ = 22222232320.

The previous prime is 22222232309. The next prime is 22222232327. The reversal of 22222232321 is 12323222222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15015071296 + 7207161025 = 122536^2 + 84895^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22222232321 is a prime.

It is not a weakly prime, because it can be changed into another prime (22222232327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11111116160 + 11111116161.

It is an arithmetic number, because the mean of its divisors is an integer number (11111116161).

Almost surely, 2^22222232321 is an apocalyptic number.

It is an amenable number.

22222232321 is a deficient number, since it is larger than the sum of its proper divisors (1).

22222232321 is an equidigital number, since it uses as much as digits as its factorization.

22222232321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 23.

Adding to 22222232321 its reverse (12323222222), we get a palindrome (34545454543).

The spelling of 22222232321 in words is "twenty-two billion, two hundred twenty-two million, two hundred thirty-two thousand, three hundred twenty-one".