1222234320221 has 2 divisors, whose sum is σ = 1222234320222. Its totient is φ = 1222234320220.

The previous prime is 1222234320173. The next prime is 1222234320227. The reversal of 1222234320221 is 1220234322221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1201788180121 + 20446140100 = 1096261^2 + 142990^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222234320221 - 2²² = 1222230125917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1222234320227) 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, 611117160110 + 611117160111.

It is an arithmetic number, because the mean of its divisors is an integer number (611117160111).

Almost surely, 2^{1222234320221} is an apocalyptic number.

It is an amenable number.

1222234320221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222234320221 is an equidigital number, since it uses as much as digits as its factorization.

1222234320221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 1222234320221 its reverse (1220234322221), we get a palindrome (2442468642442).

It can be divided in two parts, 122223 and 4320221, that added together give a palindrome (4442444).

The spelling of 1222234320221 in words is "one trillion, two hundred twenty-two billion, two hundred thirty-four million, three hundred twenty thousand, two hundred twenty-one".