The total number of lollipos that she won is 121.
Let x represent the number of friends that she has.
We were told that she gave 4 to each of her friends. It means that the total number that she gave to her friends is 4x. If she has 9 remaining, it means that
4x + 9 = 121
4x = 121 - 9
4x = 112
x = 112/4
x = 28
She has 28 friends