Shiva Purana
सहस्रैर्नवभिर्युक्तं सर्वार्थज्ञानसंयुतम् ॥ सहस्रकोटिरुद्राख्यमेकादशसहस्रकम् ॥ ५५ ॥
It is endowed with nine thousand characters and is endowed with knowledge of all meanings Sahasrakoti Rudrakhya eleven thousand.
english translation
sahasrairnavabhiryuktaM sarvArthajJAnasaMyutam ॥ sahasrakoTirudrAkhyamekAdazasahasrakam ॥ 55 ॥
hk transliteration by Sanscript