Alexander Imich, a Polish-born psychic researcher who was certified the oldest man on earth, died Sunday morning at a senior residence in Manhattan. He had turned 111 on Feb. 4.

His death was reported by a grandniece, Karen Bogen, in Rhode Island, and a longtime friend in New York, Michael Mannion, who had visited him Saturday night at the Esplanade, the senior home at West End Avenue and 74th Street where Mr. Imich had been living since 1986.

Mr. Imich became the world’s oldest validated male supercentenarian (those over 110), according to the Gerontology Research Group of Torrance, Calif., when the previous record-holder, Arturo Licata of Italy, died on April 24 at 111 years and 357 days. At the time, 66 women were officially older than Mr. Imich, with the oldest being 116.

Mr. Imich had willed his body to Mount Sinai Medical Center for study, Mr. Mannion said.

In an interview with The New York Times on April 30, Mr. Imich made light of his longevity record, saying, “Not like it’s the Nobel Prize.”