12011110121243 has 2 divisors, whose sum is σ = 12011110121244. Its totient is φ = 12011110121242.

The previous prime is 12011110121221. The next prime is 12011110121261. The reversal of 12011110121243 is 34212101111021.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (34212101111021) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12011110121243 is a prime.

It is not a weakly prime, because it can be changed into another prime (12011110121203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6005555060621 + 6005555060622.

It is an arithmetic number, because the mean of its divisors is an integer number (6005555060622).

Almost surely, 2^{12011110121243} is an apocalyptic number.

12011110121243 is a deficient number, since it is larger than the sum of its proper divisors (1).

12011110121243 is an equidigital number, since it uses as much as digits as its factorization.

12011110121243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 20.

Adding to 12011110121243 its reverse (34212101111021), we get a palindrome (46223211232264).

The spelling of 12011110121243 in words is "twelve trillion, eleven billion, one hundred ten million, one hundred twenty-one thousand, two hundred forty-three".