It celebrates Shiva as the column of fire ( Jyotirlingam ) that has no beginning or end.
The morning hours ( Brahmamuhurtha ) enhance the vibration of the Sanskrit and Tamil phonetics.
In Shaivite tradition, "Arunachala" starts with the primal sound 'A', representing the beginning of creation.
The word "Vilangidum" suggests a radiance that removes the darkness of ignorance ( Aanava ) from the devotee’s heart. Why the "121" Tag?