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_19722233_5 ( points INTEGER, blocks VARCHAR )

### Question ###
what is the lowest points scored by a player who blocked 21 times

### Accurate SQL ###

SELECT MIN(points) FROM table_19722233_5 WHERE blocks = 21