22111321 has 2 divisors, whose sum is σ = 22111322. Its totient is φ = 22111320.

The previous prime is 22111289. The next prime is 22111351. The reversal of 22111321 is 12311122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16040025 + 6071296 = 4005^2 + 2464^2 .

It is a cyclic number.

It is not a de Polignac number, because 22111321 - 2⁵ = 22111289 is a prime.

It is not a weakly prime, because it can be changed into another prime (22111351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11055660 + 11055661.

It is an arithmetic number, because the mean of its divisors is an integer number (11055661).

Almost surely, 2^22111321 is an apocalyptic number.

It is an amenable number.

22111321 is a deficient number, since it is larger than the sum of its proper divisors (1).

22111321 is an equidigital number, since it uses as much as digits as its factorization.

22111321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24, while the sum is 13.

The square root of 22111321 is about 4702.2676444456. The cubic root of 22111321 is about 280.6757530273.

Adding to 22111321 its reverse (12311122), we get a palindrome (34422443).

The spelling of 22111321 in words is "twenty-two million, one hundred eleven thousand, three hundred twenty-one".