If sperm gets on not in the vagina when your fertile pre-ejaculate near vagina ovulating?

Simple answer yes. Penetration is not required to conceive. Only viable sperm and union with a present viable egg. If a male ejaculates near the vaginal entrance and contact is achieved between the vaginal entrance and the semen, then it is possible for the sperm to travel and join with the egg.

The only surefire way to avoid conception, is to avoid any form of vaginal contact with any amount of seminal fluid. Even pre-ejaculate or precum may be enough for conception.