Hello I am 21 years old and I just met my father for the very first time this year. He is mentally ill and draws social security. I am wondering if I would be able to draw some sort of social security off him since I am in college. Also if there is any way I could get back pay in child support for 21 years. I would really appreciate it if someone could give me as much detailed information so I could know what to do or how to go about!