111111109112849 has 2 divisors, whose sum is σ = 111111109112850. Its totient is φ = 111111109112848.

The previous prime is 111111109112837. The next prime is 111111109112879. The reversal of 111111109112849 is 948211901111111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79249520928400 + 31861588184449 = 8902220^2 + 5644607^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111111109112849 is a prime.

It is not a weakly prime, because it can be changed into another prime (111111109112879) 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, 55555554556424 + 55555554556425.

It is an arithmetic number, because the mean of its divisors is an integer number (55555554556425).

Almost surely, 2^{111111109112849} is an apocalyptic number.

It is an amenable number.

111111109112849 is a deficient number, since it is larger than the sum of its proper divisors (1).

111111109112849 is an equidigital number, since it uses as much as digits as its factorization.

111111109112849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 41.

The spelling of 111111109112849 in words is "one hundred eleven trillion, one hundred eleven billion, one hundred nine million, one hundred twelve thousand, eight hundred forty-nine".