Country S has 12,345,000 residents who tested positive for COVID-19. What is the largest place value of the numeric part of this quantity?

? Number?

The largest place value of the numeric part of 12,345,000 is the millions place.

To find the largest place value of the numeric part of the quantity, we need to determine the highest place value digit in the number.

In this case, the number is 12,345,000. The highest place value digit is the leftmost digit, which is in the millions place.

The place values in the number 12,345,000 are as follows:
- Millions: 1
- Hundred thousands: 2
- Ten thousands: 3
- Thousands: 4
- Hundreds: 5
- Tens: 0
- Ones: 0

Therefore, the largest place value of the numeric part of the quantity 12,345,000 is the millions place.

The largest place value of the numeric part of the quantity 12,345,000 is the millions place.