If you're not including the 3rd, then I'd call this a Db13sus. The sus indicates to leave out the third and use the 11th (or 4th). So all the notes included would be: Db, Ab, B, Eb, Gb, Bb. Thus eliminating the clash between the 3rd and the 11th (or 4th).
If you are including the 3rd (which you didn't in your spelling), then I would call this a Db13 by the "rule" that all notes below the highest extension named may be played. So all the notes that can be used to construct a Db13 are: Db, F, Ab, B, Eb, Gb, Bb. Considering that this includes every note in the scale, it's quite rare that a "true" Db13 chord is every played because it is so challenging to make all of these notes sound good together.
After a long debate (which musallio alluded to), I came up with two "rules" to define my use of chord symbols:
1) An extension outside of parenthesis indicates that any chord tone below it may be used unless the word "sus" appears, in which case the 3rd is replaced with the 11th.
2) Tones inside parenthesis are to be added to the existing chord that is outside the parenthesis.
Here are some examples:
C9(13) - C, E, G, Bb, D, A
C7(11) - C, E, G, Bb, F
C7(#5,13) - C, E, G#, Bb, A
C9sus - C, G, Bb, D, F
My goal with these "rules" is two-fold - To eliminate any confusion and to use as few symbols as possible. What I used to call C13, I now call C7(13) or C9(13), because the first reason is always the most important - Eliminate confusion.
And, of course, I'm sure that over time I will refine my "rules" even more.