No, Bulgaria is not further west than the prime meridian (zero degrees latitude).
Yes, Bulgaria is further east than the prime meridian (zero degrees latitude). The midpoint of Bulgaria is further east by approximately 770 miles (1,239km).
Yes, Bulgaria is further north than the equator. The midpoint of Bulgaria is further north by approximately 2,953 miles (4,752km).
No, Bulgaria is not further south than the equator.