As per Shastra’s :

।। अश्वमेधसहस्त्राणि यज्ञ कोटि शतानि च गवा शतसहस्त्रस्य सम्यगत्तस्ययत्फलं तत्फलं शीघ्रमाप्नोति वक्त्रैकादश धारणात हरस्य सदृशो लोके पुनर्जन्म विद्यते ।।
पद्म पुराण, अ. ५७, श्लो. ७८/७९

The 11 Mukhi Rudraksha represents Lord Hanuman. By wearing it one becomes like Shiva and later one is liberated from the cycle of birth and death.

Padma Purana, Chapter. 57, Shloka. 78/79

Essence of Eleven Mukhi Rudraksha:

The 11 Mukhi Rudraksha is blessed by Lord Hanuman. He is also called as Ekadash Rudra. Hanuman is virtuous, strong and infallible in his physical, mental and oratorical skills. As per the Padma Purana anyone who wears the 11 Mukhi is known to be abundantly blessed with all the virtues of Lord Hanuman. He would gain negotiation skills, self-confidence, intelligence, physical strength and a powerful mind.

This divine bead has a unique power to control the physical senses. It is believed makes the wearer fearless and is highly recommend during meditation and also to inculcate single minded devotion to God. Lord Indra also blesses this Rudraksha. This bead brings good luck, good fortune, man-management skills and power to gain absolute control over senses. The eleven Rudras reside in the 11 facets of this bead. The Hanuman Chalisa sums up the energy of Lord Hanuman in some simple stanzas.

Even merely meditating on Lord Hanuman is said to boost strength, self-confidence and courage. This is the true essence of the divine energy that rules the 11 Mukhi Rudraksha. This bead controls the malefic effects of the planet Mars. It is worn individually around the neck. Ancient scriptures advised people to wear it on the Shikha (tuft of hair on top of the head) to energize the Sahasrara / Crown Chakra. It is also worn with the 9 and 10 Mukhi Rudraksha in the power combination for protection.