Annapurna (अन्नपूर्णा) combines the Sanskrit anna (food) and purna (full) — "she who is full of food." The Hindu goddess of nourishment — a manifestation of Parvati who, when Shiva claimed the world was illusion, withdrew all food from creation until he begged her to return. Worshipped especially at the Annapurna Temple in Varanasi. The Annapurna massif in Nepal is named after her.
Annapurna does not currently appear in the US Social Security Administration's top 1,000 girls' names, so we don't publish a US rank or birth count for it. That says nothing about the name's standing elsewhere in the world — only that it sits outside the ranked US data we rely on.
In Pythagorean numerology the letters of Annapurna reduce to 1, The Leader. This is a traditional interpretive system, not a factual claim about the name.