12222404221 has 2 divisors, whose sum is σ = 12222404222. Its totient is φ = 12222404220.

The previous prime is 12222404209. The next prime is 12222404251. The reversal of 12222404221 is 12240422221.

12222404221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9567578596 + 2654825625 = 97814^2 + 51525^2 .

It is an emirp because it is prime and its reverse (12240422221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12222404221 - 2¹⁵ = 12222371453 is a prime.

It is a super-3 number, since 3×12222404221³ (a number of 31 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12222404192 and 12222404201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12222404251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6111202110 + 6111202111.

It is an arithmetic number, because the mean of its divisors is an integer number (6111202111).

Almost surely, 2^12222404221 is an apocalyptic number.

It is an amenable number.

12222404221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12222404221 is an equidigital number, since it uses as much as digits as its factorization.

12222404221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 12222404221 its reverse (12240422221), we get a palindrome (24462826442).

The spelling of 12222404221 in words is "twelve billion, two hundred twenty-two million, four hundred four thousand, two hundred twenty-one".