12112221212197 has 2 divisors, whose sum is σ = 12112221212198. Its totient is φ = 12112221212196.

The previous prime is 12112221212167. The next prime is 12112221212237. The reversal of 12112221212197 is 79121212221121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6235213755681 + 5877007456516 = 2497041^2 + 2424254^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12112221212197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12112221212167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6056110606098 + 6056110606099.

It is an arithmetic number, because the mean of its divisors is an integer number (6056110606099).

Almost surely, 2^{12112221212197} is an apocalyptic number.

It is an amenable number.

12112221212197 is a deficient number, since it is larger than the sum of its proper divisors (1).

12112221212197 is an equidigital number, since it uses as much as digits as its factorization.

12112221212197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 34.

The spelling of 12112221212197 in words is "twelve trillion, one hundred twelve billion, two hundred twenty-one million, two hundred twelve thousand, one hundred ninety-seven".