If 11 and 111 is counted as 1 digit, the answer is 119.
If 11 is counted as 2 digit 1's, the answer is 131.
11 times
As a digit in other numbers it appears 20 times
Infinitely many.
18
200
200
16
It appears 25 times.
A total of 44 times.
18 times
20000 times
700000