111110111078243 has 2 divisors, whose sum is σ = 111110111078244. Its totient is φ = 111110111078242.

The previous prime is 111110111078231. The next prime is 111110111078297. The reversal of 111110111078243 is 342870111011111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111110111078243 - 2²⁴ = 111110094301027 is a prime.

It is not a weakly prime, because it can be changed into another prime (111110111078543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55555055539121 + 55555055539122.

It is an arithmetic number, because the mean of its divisors is an integer number (55555055539122).

Almost surely, 2^{111110111078243} is an apocalyptic number.

111110111078243 is a deficient number, since it is larger than the sum of its proper divisors (1).

111110111078243 is an equidigital number, since it uses as much as digits as its factorization.

111110111078243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 32.

Adding to 111110111078243 its reverse (342870111011111), we get a palindrome (453980222089354).

The spelling of 111110111078243 in words is "one hundred eleven trillion, one hundred ten billion, one hundred eleven million, seventy-eight thousand, two hundred forty-three".