I can think of a couple that would work.
Like 99. 9+9=18 (multiple of 9), it's odd and has two digits.
.
The full set is 27 45 63 81 99.
45
The number 1111115
No. A multiple of an even number cannot be odd.
There are 5760 such numbers.
odd - even numbers are a multiple of 2.
21 or 35
27 cannot be a multiple of 4 because 27 is an odd number and 4 is an even number. No odd number can be a multiple of an even number, only even numbers can be multiples of even numbers.
The number is 35.
25 of them
14 and 35
The locker number is 119
Unless you specify the number of digits, the question has no answer. Numbers don't stop.