22111313221 has 2 divisors, whose sum is σ = 22111313222. Its totient is φ = 22111313220.

The previous prime is 22111313219. The next prime is 22111313227. The reversal of 22111313221 is 12231311122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21283600321 + 827712900 = 145889^2 + 28770^2 .

It is a cyclic number.

It is not a de Polignac number, because 22111313221 - 2¹ = 22111313219 is a prime.

Together with 22111313219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22111313227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11055656610 + 11055656611.

It is an arithmetic number, because the mean of its divisors is an integer number (11055656611).

Almost surely, 2^22111313221 is an apocalyptic number.

It is an amenable number.

22111313221 is a deficient number, since it is larger than the sum of its proper divisors (1).

22111313221 is an equidigital number, since it uses as much as digits as its factorization.

22111313221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 144, while the sum is 19.

Adding to 22111313221 its reverse (12231311122), we get a palindrome (34342624343).

The spelling of 22111313221 in words is "twenty-two billion, one hundred eleven million, three hundred thirteen thousand, two hundred twenty-one".