22211011112221 has 2 divisors, whose sum is σ = 22211011112222. Its totient is φ = 22211011112220.

The previous prime is 22211011112183. The next prime is 22211011112231. The reversal of 22211011112221 is 12221111011222.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19747900587321 + 2463110524900 = 4443861^2 + 1569430^2 .

It is a cyclic number.

It is not a de Polignac number, because 22211011112221 - 2¹¹ = 22211011110173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22211011112231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11105505556110 + 11105505556111.

It is an arithmetic number, because the mean of its divisors is an integer number (11105505556111).

Almost surely, 2^{22211011112221} is an apocalyptic number.

It is an amenable number.

22211011112221 is a deficient number, since it is larger than the sum of its proper divisors (1).

22211011112221 is an equidigital number, since it uses as much as digits as its factorization.

22211011112221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 22211011112221 its reverse (12221111011222), we get a palindrome (34432122123443).

The spelling of 22211011112221 in words is "twenty-two trillion, two hundred eleven billion, eleven million, one hundred twelve thousand, two hundred twenty-one".