Daniel Tammet is high functioning autistic (Asperger’s) savant and a mathematical and linguistic genius. He can perform mind-boggling mathematical calculations at fantastic speeds. He speaks seven languages and is even devising his own. He has memorized Pi to more than 22,500 digits.

Scientists think he may be the key to unlock the secrets of autism. 

He doesn’t calculate numbers as much as experience them,  for him, each one has a color or a shape.