12112011021217 has 2 divisors, whose sum is σ = 12112011021218. Its totient is φ = 12112011021216.

The previous prime is 12112011021157. The next prime is 12112011021223. The reversal of 12112011021217 is 71212011021121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11837425589136 + 274585432081 = 3440556^2 + 524009^2 .

It is a cyclic number.

It is not a de Polignac number, because 12112011021217 - 2²⁷ = 12111876803489 is a prime.

It is a super-2 number, since 2×12112011021217² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12112011021317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6056005510608 + 6056005510609.

It is an arithmetic number, because the mean of its divisors is an integer number (6056005510609).

Almost surely, 2^{12112011021217} is an apocalyptic number.

It is an amenable number.

12112011021217 is a deficient number, since it is larger than the sum of its proper divisors (1).

12112011021217 is an equidigital number, since it uses as much as digits as its factorization.

12112011021217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112, while the sum is 22.

Adding to 12112011021217 its reverse (71212011021121), we get a palindrome (83324022042338).

The spelling of 12112011021217 in words is "twelve trillion, one hundred twelve billion, eleven million, twenty-one thousand, two hundred seventeen".