12112221212011 has 2 divisors, whose sum is σ = 12112221212012. Its totient is φ = 12112221212010.

The previous prime is 12112221211957. The next prime is 12112221212027. The reversal of 12112221212011 is 11021212221121.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (11021212221121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12112221212011 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12112221212011.

It is not a weakly prime, because it can be changed into another prime (12112221212111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6056110606005 + 6056110606006.

It is an arithmetic number, because the mean of its divisors is an integer number (6056110606006).

Almost surely, 2^{12112221212011} is an apocalyptic number.

12112221212011 is a deficient number, since it is larger than the sum of its proper divisors (1).

12112221212011 is an equidigital number, since it uses as much as digits as its factorization.

12112221212011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 12112221212011 its reverse (11021212221121), we get a palindrome (23133433433132).

The spelling of 12112221212011 in words is "twelve trillion, one hundred twelve billion, two hundred twenty-one million, two hundred twelve thousand, eleven".