The number 21 is a common motif among Satanists and “demons.”

“Dead I am the life, dig into the skin
Knuckle crack the bone, twenty one to win
Dead I am the dog, hound of hell you cry
Devil on your back, I can never die

Dragula by Rob Zombie (stance 9)

Note:  The number 9 symbolizes life (think “9 lives” of a cat, etc).

Note:  Businesses with the number 21 are most likely owned by  Lion’s or Foxes.

Educating humans about the shape-shifting, and human possessions within "The Illuminati"