111100685849 has 2 divisors, whose sum is σ = 111100685850. Its totient is φ = 111100685848.

The previous prime is 111100685831. The next prime is 111100685851. The reversal of 111100685849 is 948586001111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101788435849 + 9312250000 = 319043^2 + 96500^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111100685849 is a prime.

It is a super-2 number, since 2×111100685849² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 111100685851, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (111100685809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55550342924 + 55550342925.

It is an arithmetic number, because the mean of its divisors is an integer number (55550342925).

Almost surely, 2^111100685849 is an apocalyptic number.

It is an amenable number.

111100685849 is a deficient number, since it is larger than the sum of its proper divisors (1).

111100685849 is an equidigital number, since it uses as much as digits as its factorization.

111100685849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 44.

The spelling of 111100685849 in words is "one hundred eleven billion, one hundred million, six hundred eighty-five thousand, eight hundred forty-nine".