Procter & Gamble (PG 0.23%) is a paragon of long-term stability, even by the blue-chip standards of the Dow Jones Industrial Average (^DJI -0.15%) Roughly 4.8 billion customers around the globe enjoy P&G's household products, and the company boasts 25 brands with billion-dollar annual sales.

Even better, P&G investors have enjoyed 123 years of uninterrupted dividend payments, including 57 straight annual payout boosts -- and the streak continues.

What's behind P&G's sterling business performance, and what sets the company apart from respectable rivals such as Kimberly-Clark (KMB 0.04%) and Clorox (CLX 0.67%)? Fool analyst Anders Bylund dives into Procter & Gamble's unique competitive advantage in the video below.