1. The digits of numbers from 20 to 99 occupy the first $80 \cdot 2=160$ places in this sequence. There are $2021-160=1861$ places left. The digits of numbers from 100 to 719 occupy the next $(719-99) \cdot 3=1860$ places. Therefore, the 2021st place is the first digit of the number 720, which is 7.
Answer: 7. Answer to option: $1-2: 0$.