He is fluent in at least the following languages: English, German,
French, Spanish, Finnish, Lithuanian, Estonian, Icelandic, and
Esperanto. In addition, he has created three new languages called
Mänti, Uusisuom, and Lapsi.
Has asperger's syndrome, a form of autism. Also has synaesthesia, which is why he sees numbers as beautiful shapes and colors.
When he learned to count at young age, he would see colors and pictures
in his mind. At that time, he assumed that everyone saw numbers as he
did.
Is the European and British record holder and number four in the world
in remembering the mathematical constant Pi. He used his incredible
memory to recite 22,514 decimal places. [14 March 2004]
His autobiography is a best-seller, translated into 20 languages. His second book details how the brain works.