Question: how did utnapishtim receive everlasting life?
Answer: Utnapishtim then made sacrifices and libations to the gods and, although Enlil was angry that someone had survived his flood, Ea advised him to make his peace. So, Enlil blessed Utnapishtim and his wife and granted them everlasting life, and took them to live in the land of the gods on the island of Dilmun.