King Faisal International Prize
He was a Fellow of the Royal Society, London as well as recipient of French National Order of Merit in 1989. He was awarded the Padma Bhushan, India's third highest civilian honor, in 1990. He was also the recipient of the Shanti Swarup Bhatnagar Prize in 1975, Third World Academy of Sciences Prize for Mathematics in 1987, and the Srinivasa Ramanujan Medal in 1988. He was also the recipient of the King Faisal International Prize for Science in 2006, and award that he won jointly with mathematician Simon Donaldson, Imperial College. As of 2021, he was the only Indian to have won the King Faisal International Prize for Science.