12210221120221 has 2 divisors, whose sum is σ = 12210221120222. Its totient is φ = 12210221120220.

The previous prime is 12210221120189. The next prime is 12210221120231. The reversal of 12210221120221 is 12202112201221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11538827703225 + 671393416996 = 3396885^2 + 819386^2 .

It is a cyclic number.

It is not a de Polignac number, because 12210221120221 - 2⁵ = 12210221120189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12210221120231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6105110560110 + 6105110560111.

It is an arithmetic number, because the mean of its divisors is an integer number (6105110560111).

Almost surely, 2^{12210221120221} is an apocalyptic number.

It is an amenable number.

12210221120221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12210221120221 is an equidigital number, since it uses as much as digits as its factorization.

12210221120221 is an evil number, because the sum of its binary digits is even.

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

Adding to 12210221120221 its reverse (12202112201221), we get a palindrome (24412333321442).

The spelling of 12210221120221 in words is "twelve trillion, two hundred ten billion, two hundred twenty-one million, one hundred twenty thousand, two hundred twenty-one".