12111122123 has 2 divisors, whose sum is σ = 12111122124. Its totient is φ = 12111122122.

The previous prime is 12111122119. The next prime is 12111122141. The reversal of 12111122123 is 32122111121.

It is a happy number.

12111122123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12111122123 - 2² = 12111122119 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (12111182123) 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, 6055561061 + 6055561062.

It is an arithmetic number, because the mean of its divisors is an integer number (6055561062).

Almost surely, 2^12111122123 is an apocalyptic number.

12111122123 is a deficient number, since it is larger than the sum of its proper divisors (1).

12111122123 is an equidigital number, since it uses as much as digits as its factorization.

12111122123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48, while the sum is 17.

Adding to 12111122123 its reverse (32122111121), we get a palindrome (44233233244).

The spelling of 12111122123 in words is "twelve billion, one hundred eleven million, one hundred twenty-two thousand, one hundred twenty-three".