22221302321 has 2 divisors, whose sum is σ = 22221302322. Its totient is φ = 22221302320.

The previous prime is 22221302281. The next prime is 22221302329. The reversal of 22221302321 is 12320312222.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13102007296 + 9119295025 = 114464^2 + 95495^2 .

It is a cyclic number.

It is not a de Polignac number, because 22221302321 - 2¹⁴ = 22221285937 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22221302293 and 22221302302.

It is not a weakly prime, because it can be changed into another prime (22221302329) 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, 11110651160 + 11110651161.

It is an arithmetic number, because the mean of its divisors is an integer number (11110651161).

Almost surely, 2^22221302321 is an apocalyptic number.

It is an amenable number.

22221302321 is a deficient number, since it is larger than the sum of its proper divisors (1).

22221302321 is an equidigital number, since it uses as much as digits as its factorization.

22221302321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 22221302321 its reverse (12320312222), we get a palindrome (34541614543).

Subtracting from 22221302321 its reverse (12320312222), we obtain a palindrome (9900990099).

The spelling of 22221302321 in words is "twenty-two billion, two hundred twenty-one million, three hundred two thousand, three hundred twenty-one".