22100133221 has 2 divisors, whose sum is σ = 22100133222. Its totient is φ = 22100133220.

The previous prime is 22100133173. The next prime is 22100133239. The reversal of 22100133221 is 12233100122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12929964100 + 9170169121 = 113710^2 + 95761^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22100133221 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 22100133221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22100133721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11050066610 + 11050066611.

It is an arithmetic number, because the mean of its divisors is an integer number (11050066611).

Almost surely, 2^22100133221 is an apocalyptic number.

It is an amenable number.

22100133221 is a deficient number, since it is larger than the sum of its proper divisors (1).

22100133221 is an equidigital number, since it uses as much as digits as its factorization.

22100133221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 22100133221 its reverse (12233100122), we get a palindrome (34333233343).

The spelling of 22100133221 in words is "twenty-two billion, one hundred million, one hundred thirty-three thousand, two hundred twenty-one".