Declension table of dvādaśa

Neuter	Singular	Dual	Plural
Nominative	dvādaśam	dvādaśe	dvādaśāni
Vocative	dvādaśa	dvādaśe	dvādaśāni
Accusative	dvādaśam	dvādaśe	dvādaśāni
Instrumental	dvādaśena	dvādaśābhyām	dvādaśaiḥ
Dative	dvādaśāya	dvādaśābhyām	dvādaśebhyaḥ
Ablative	dvādaśāt	dvādaśābhyām	dvādaśebhyaḥ
Genitive	dvādaśasya	dvādaśayoḥ	dvādaśānām
Locative	dvādaśe	dvādaśayoḥ	dvādaśeṣu

Compound dvādaśa -

Adverb -dvādaśam -dvādaśāt