22102313221 has 2 divisors, whose sum is σ = 22102313222. Its totient is φ = 22102313220.

The previous prime is 22102313209. The next prime is 22102313231. The reversal of 22102313221 is 12231320122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21852230625 + 250082596 = 147825^2 + 15814^2 .

It is a cyclic number.

It is not a de Polignac number, because 22102313221 - 2¹⁷ = 22102182149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22102313231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11051156610 + 11051156611.

It is an arithmetic number, because the mean of its divisors is an integer number (11051156611).

Almost surely, 2^22102313221 is an apocalyptic number.

It is an amenable number.

22102313221 is a deficient number, since it is larger than the sum of its proper divisors (1).

22102313221 is an equidigital number, since it uses as much as digits as its factorization.

22102313221 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 22102313221 its reverse (12231320122), we get a palindrome (34333633343).

The spelling of 22102313221 in words is "twenty-two billion, one hundred two million, three hundred thirteen thousand, two hundred twenty-one".