12110111231 has 2 divisors, whose sum is σ = 12110111232. Its totient is φ = 12110111230.

The previous prime is 12110111173. The next prime is 12110111267. The reversal of 12110111231 is 13211101121.

It is a strong prime.

It is an emirp because it is prime and its reverse (13211101121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12110111231 is a prime.

It is a super-4 number, since 4×12110111231⁴ (a number of 41 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12110113231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6055055615 + 6055055616.

It is an arithmetic number, because the mean of its divisors is an integer number (6055055616).

Almost surely, 2^12110111231 is an apocalyptic number.

12110111231 is a deficient number, since it is larger than the sum of its proper divisors (1).

12110111231 is an equidigital number, since it uses as much as digits as its factorization.

12110111231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 12110111231 its reverse (13211101121), we get a palindrome (25321212352).

The spelling of 12110111231 in words is "twelve billion, one hundred ten million, one hundred eleven thousand, two hundred thirty-one".