do i have a right to ask property share from my father when alive?

Hi Sir, I have been helping to my family last 5 years by giving 50k every month as i am doing software job. Suddenly i got sick financially, when i urged for some help from my father he is not agreeing to give me/help to come out of this situation and supporting his elder son. we have 20 acres land value of minimum 2 crore. what can i do in this case i am totally out of help any suggestions. i lost 15lakhs in business that was taken from the banks personal loans. recently i lost my job as well and i am not yet married, but my elder brother and sister are married. If i become a defaulter to the banks, do the banks have right to approach legally over the property that my father own to recover the loan amount or how bank will react. If i want to have a share from my father what i have to do or suggest me the right way If possible any suggestion will be highly appreciable!!