Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_36215 ( "Rank" real, "Player" text, "Country" text, "Events" real, "Prize money ( $ )" real )

### Question ###
What is the least amount of prize money when there are 21 events?

### Accurate SQL ###

SELECT MIN("Prize money ( $ )") FROM table_36215 WHERE "Events" = '21'