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_214920_1 (land_area VARCHAR, density__pop_per_km2_ VARCHAR)

### Question ###
What is the land area of the RCM having a density of 21.1?

### Accurate SQL ###

SELECT land_area FROM table_214920_1 WHERE density__pop_per_km2_ = "21.1"