Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_21979779_1 (no INTEGER, production_code VARCHAR)
### Question:
what is the biggest series episode number whose production code is 2t7211?
### Answer:
SELECT MAX(no) FROM table_21979779_1 WHERE production_code = "2T7211"