Declension table of ?dvādaśasāhasra

Neuter	Singular	Dual	Plural
Nominative	dvādaśasāhasram	dvādaśasāhasre	dvādaśasāhasrāṇi
Vocative	dvādaśasāhasra	dvādaśasāhasre	dvādaśasāhasrāṇi
Accusative	dvādaśasāhasram	dvādaśasāhasre	dvādaśasāhasrāṇi
Instrumental	dvādaśasāhasreṇa	dvādaśasāhasrābhyām	dvādaśasāhasraiḥ
Dative	dvādaśasāhasrāya	dvādaśasāhasrābhyām	dvādaśasāhasrebhyaḥ
Ablative	dvādaśasāhasrāt	dvādaśasāhasrābhyām	dvādaśasāhasrebhyaḥ
Genitive	dvādaśasāhasrasya	dvādaśasāhasrayoḥ	dvādaśasāhasrāṇām
Locative	dvādaśasāhasre	dvādaśasāhasrayoḥ	dvādaśasāhasreṣu

Compound dvādaśasāhasra -

Adverb -dvādaśasāhasram -dvādaśasāhasrāt