22231210321 has 2 divisors, whose sum is σ = 22231210322. Its totient is φ = 22231210320.

The previous prime is 22231210297. The next prime is 22231210333. The reversal of 22231210321 is 12301213222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17712681921 + 4518528400 = 133089^2 + 67220^2 .

It is a cyclic number.

It is not a de Polignac number, because 22231210321 - 2²¹ = 22229113169 is a prime.

It is not a weakly prime, because it can be changed into another prime (22231210361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11115605160 + 11115605161.

It is an arithmetic number, because the mean of its divisors is an integer number (11115605161).

Almost surely, 2^22231210321 is an apocalyptic number.

It is an amenable number.

22231210321 is a deficient number, since it is larger than the sum of its proper divisors (1).

22231210321 is an equidigital number, since it uses as much as digits as its factorization.

22231210321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 22231210321 its reverse (12301213222), we get a palindrome (34532423543).

The spelling of 22231210321 in words is "twenty-two billion, two hundred thirty-one million, two hundred ten thousand, three hundred twenty-one".