12112321181 has 2 divisors, whose sum is σ = 12112321182. Its totient is φ = 12112321180.

The previous prime is 12112321127. The next prime is 12112321259. The reversal of 12112321181 is 18112321121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10809760900 + 1302560281 = 103970^2 + 36091^2 .

It is a cyclic number.

It is not a de Polignac number, because 12112321181 - 2¹⁴ = 12112304797 is a prime.

It is a super-2 number, since 2×12112321181² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12112321681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6056160590 + 6056160591.

It is an arithmetic number, because the mean of its divisors is an integer number (6056160591).

Almost surely, 2^12112321181 is an apocalyptic number.

It is an amenable number.

12112321181 is a deficient number, since it is larger than the sum of its proper divisors (1).

12112321181 is an equidigital number, since it uses as much as digits as its factorization.

12112321181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 192, while the sum is 23.

The spelling of 12112321181 in words is "twelve billion, one hundred twelve million, three hundred twenty-one thousand, one hundred eighty-one".