Although I have no knowledge of how Prince lived, I’ll go out on a limb and assume he has been, in one way or another, supporting his family and likely many others for some time. And since he has no known heir, the State of Minnesota should be his beneficiary But I’m no lawyer..
His estate goes to his sister and half-siblings. No parents living, no spouse, and he had no children (an infant died at around a week old years ago)..so siblings are next in line.