Your number, one digit away
One digit away
One change could reach Singular.
Your number
212,921
Exceptional · Top 2.31%
Position 4: 9 → 1 · +360 points.
Gained: ABAB pattern, Digit sum 9, Only two distinct digits, 2 distinct digits, Harshad number, Zigzag digits.
Lost: Digit sum 17, 3 distinct digits, Semiprime.
53 legal neighbours · same digit length · no leading zeros. This describes an alternative number, not the odds of your next roll.