12111122117 has 2 divisors, whose sum is σ = 12111122118. Its totient is φ = 12111122116.

The previous prime is 12111122083. The next prime is 12111122119. The reversal of 12111122117 is 71122111121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10521425476 + 1589696641 = 102574^2 + 39871^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12111122117 is a prime.

Together with 12111122119, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12111122119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6055561058 + 6055561059.

It is an arithmetic number, because the mean of its divisors is an integer number (6055561059).

Almost surely, 2^12111122117 is an apocalyptic number.

It is an amenable number.

12111122117 is a deficient number, since it is larger than the sum of its proper divisors (1).

12111122117 is an equidigital number, since it uses as much as digits as its factorization.

12111122117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56, while the sum is 20.

Adding to 12111122117 its reverse (71122111121), we get a palindrome (83233233238).

The spelling of 12111122117 in words is "twelve billion, one hundred eleven million, one hundred twenty-two thousand, one hundred seventeen".