12112221002221 has 2 divisors, whose sum is σ = 12112221002222. Its totient is φ = 12112221002220.

The previous prime is 12112221002131. The next prime is 12112221002227. The reversal of 12112221002221 is 12220012221121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9609690002500 + 2502530999721 = 3099950^2 + 1581939^2 .

It is a cyclic number.

It is not a de Polignac number, because 12112221002221 - 2⁷ = 12112221002093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12112221002227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6056110501110 + 6056110501111.

It is an arithmetic number, because the mean of its divisors is an integer number (6056110501111).

Almost surely, 2^{12112221002221} is an apocalyptic number.

It is an amenable number.

12112221002221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12112221002221 is an equidigital number, since it uses as much as digits as its factorization.

12112221002221 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 12112221002221 its reverse (12220012221121), we get a palindrome (24332233223342).

The spelling of 12112221002221 in words is "twelve trillion, one hundred twelve billion, two hundred twenty-one million, two thousand, two hundred twenty-one".