What is "ubara-tutu"

Ubara-tutu (or Ubartutu) of Shuruppak was the last antediluvian king of Sumer. He was said to have reigned for 18,600 years.

Ubaratutu lived until the deluge swept over the land, like Lamech, the father of Noah.

After the deluge, the kingship was reestablished in the northern city of Kish, according to the Sumerian king list.