222211000112221 has 2 divisors, whose sum is σ = 222211000112222. Its totient is φ = 222211000112220.

The previous prime is 222211000112219. The next prime is 222211000112273. The reversal of 222211000112221 is 122211000112222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 172397188860121 + 49813811252100 = 13130011^2 + 7057890^2 .

It is a cyclic number.

It is not a de Polignac number, because 222211000112221 - 2¹ = 222211000112219 is a prime.

Together with 222211000112219, 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 (222211000112021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111105500056110 + 111105500056111.

It is an arithmetic number, because the mean of its divisors is an integer number (111105500056111).

Almost surely, 2^{222211000112221} is an apocalyptic number.

It is an amenable number.

222211000112221 is a deficient number, since it is larger than the sum of its proper divisors (1).

222211000112221 is an equidigital number, since it uses as much as digits as its factorization.

222211000112221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 222211000112221 its reverse (122211000112222), we get a palindrome (344422000224443).

Subtracting from 222211000112221 its reverse (122211000112222), we obtain a palindrome (99999999999999).

The spelling of 222211000112221 in words is "two hundred twenty-two trillion, two hundred eleven billion, one hundred twelve thousand, two hundred twenty-one".