22222222232321 has 4 divisors (see below), whose sum is σ = 22222253090772. Its totient is φ = 22222191373872.

The previous prime is 22222222232317. The next prime is 22222222232323. The reversal of 22222222232321 is 12323222222222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4537581625600 + 17684640606721 = 2130160^2 + 4205311^2 .

It is a cyclic number.

It is not a de Polignac number, because 22222222232321 - 2² = 22222222232317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22222222232323) 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 in 3 ways as a sum of consecutive naturals, for example, 14322566 + ... + 15798111.

It is an arithmetic number, because the mean of its divisors is an integer number (5555563272693).

Almost surely, 2^{22222222232321} is an apocalyptic number.

It is an amenable number.

22222222232321 is a deficient number, since it is larger than the sum of its proper divisors (30858451).

22222222232321 is an equidigital number, since it uses as much as digits as its factorization.

22222222232321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30858450.

The product of its digits is 18432, while the sum is 29.

Adding to 22222222232321 its reverse (12323222222222), we get a palindrome (34545444454543).

The spelling of 22222222232321 in words is "twenty-two trillion, two hundred twenty-two billion, two hundred twenty-two million, two hundred thirty-two thousand, three hundred twenty-one".