In a certain code language, ‘WHILE’ is written as ‘2167103’ and ‘DEPTH’ is written as ‘2314186’. How will ‘ROUND’ be written in that language?

The pattern consists of subtracting $2$ from the standard alphabetical positional value of each letter and then concatenating the results.
For 'WHILE' $\to$ '2167103':

* W (23) $-2=21$
* H (8) $-2=6$
* I (9) $-2=7$
* L (12) $-2=10$
* E (5) $-2=3$

For 'DEPTH' $\to$ '2314186':

* D (4) $-2=2$
* E (5) $-2=3$
* P (16) $-2=14$
* T (20) $-2=18$
* H (8) $-2=6$

Applying the same process to 'ROUND':

* R (18) $-2=16$
* O (15) $-2=13$
* U (21) $-2=19$
* N (14) $-2=12$
* D (4) $-2=2$

Combining these values yields 161319122.