probability of getting 123 or 221 is equal IN A 3 DIGIT STRING
probability of getting 221 is bigger than getting 123 in A MILLION DIGIT STRING
this is old and not really related but here as you can veryfy with your browser searcher number 21 appears(with the searcher rules) 10% more than number 11
check yourself dont just believe me
http://www.eveandersson.com/pi/digits/1000000