CREATE TABLE table_name_26 (area__km²_ INTEGER, total__km²_ VARCHAR(255), province VARCHAR(255), comune VARCHAR(255))
What is the Piano di Sorrento, Napoli lowest km2 with a total smaller than 121.14 km2?
    
SQL: SELECT MIN(area__km²_) FROM table_name_26 WHERE province = "napoli" AND comune = "piano di sorrento" AND total__km²_ < 121.14