A certain seven digit number has only ones in the ones period only threes in the thousands period and only twos in the lakhs period the number is?

2233111

In the Indian numbering system: The first period, called ones period, is formed with the first three digits of the number.

• The second period, called thousands period, is formed with the next two digits of the number.

• The third period, called lakhs period, is formed with the next two digits of the number.

• The fourth period, called crores period, is formed with the digits that come after lakhs.