12112221211 has 2 divisors, whose sum is σ = 12112221212. Its totient is φ = 12112221210.

The previous prime is 12112221193. The next prime is 12112221263. The reversal of 12112221211 is 11212221121.

It is a weak prime.

It is an emirp because it is prime and its reverse (11212221121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12112221211 - 2⁹ = 12112220699 is a prime.

It is not a weakly prime, because it can be changed into another prime (12112221311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6056110605 + 6056110606.

It is an arithmetic number, because the mean of its divisors is an integer number (6056110606).

Almost surely, 2^12112221211 is an apocalyptic number.

12112221211 is a deficient number, since it is larger than the sum of its proper divisors (1).

12112221211 is an equidigital number, since it uses as much as digits as its factorization.

12112221211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32, while the sum is 16.

Adding to 12112221211 its reverse (11212221121), we get a palindrome (23324442332).

The spelling of 12112221211 in words is "twelve billion, one hundred twelve million, two hundred twenty-one thousand, two hundred eleven".