CREATE TABLE table_name_21 (density_per_km² INTEGER, number__map_ VARCHAR(255), area_in_km² VARCHAR(255))
Which Density per km² is the lowest one that has a Number (map) smaller than 13, and an Area in km² of 11.1?
    
SQL: SELECT MIN(density_per_km²) FROM table_name_21 WHERE number__map_ < 13 AND area_in_km² = 11.1