13, 35, 57, 79, 911,?

Series pattern
The elements of the given series are the numbers formed by joining together consecutive add numbers in order
i.e, 1 and 3, 3 and 5, 5 and 7, 7 and 9, 9 and 11,...
∴ Missing tern = Number formed by joining 11 and 13 = 1113