12211223330221 has 2 divisors, whose sum is σ = 12211223330222. Its totient is φ = 12211223330220.

The previous prime is 12211223330209. The next prime is 12211223330263. The reversal of 12211223330221 is 12203332211221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11528666461321 + 682556868900 = 3395389^2 + 826170^2 .

It is a cyclic number.

It is not a de Polignac number, because 12211223330221 - 2³¹ = 12209075846573 is a prime.

It is a super-2 number, since 2×12211223330221² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12211223330321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6105611665110 + 6105611665111.

It is an arithmetic number, because the mean of its divisors is an integer number (6105611665111).

Almost surely, 2^{12211223330221} is an apocalyptic number.

It is an amenable number.

12211223330221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12211223330221 is an equidigital number, since it uses as much as digits as its factorization.

12211223330221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 12211223330221 its reverse (12203332211221), we get a palindrome (24414555541442).

The spelling of 12211223330221 in words is "twelve trillion, two hundred eleven billion, two hundred twenty-three million, three hundred thirty thousand, two hundred twenty-one".