Answer
There are 100 times as many secondary turns as primary turns.
Work Step by Step
Use the transformer relationship.
$$\frac{primary \; voltage}{\# \; of \; primary \; turns} = \frac{secondary \; voltage}{\# \; of \; secondary \; turns}$$
$$\frac{120 V}{\# \; of \; primary \; turns} = \frac{12000 V}{\# \; of \; secondary \; turns}$$
$$\frac{12000 V}{120 V} = \frac{\# \; of \; secondary \; turns }{\# \; of \; primary \; turns}$$
There are 100 times as many secondary turns as there are primary turns.