Declension table of ?pratikartavya

Neuter	Singular	Dual	Plural
Nominative	pratikartavyam	pratikartavye	pratikartavyāni
Vocative	pratikartavya	pratikartavye	pratikartavyāni
Accusative	pratikartavyam	pratikartavye	pratikartavyāni
Instrumental	pratikartavyena	pratikartavyābhyām	pratikartavyaiḥ
Dative	pratikartavyāya	pratikartavyābhyām	pratikartavyebhyaḥ
Ablative	pratikartavyāt	pratikartavyābhyām	pratikartavyebhyaḥ
Genitive	pratikartavyasya	pratikartavyayoḥ	pratikartavyānām
Locative	pratikartavye	pratikartavyayoḥ	pratikartavyeṣu

Compound pratikartavya -

Adverb -pratikartavyam -pratikartavyāt