The number "123" is a three-digit integer that follows "122" and precedes "124" in the number line. It is often used in counting and basic arithmetic. In mathematics, "123" can be expressed in various forms, such as a sum (100 + 20 + 3) or a product (3 × 41). In popular culture, "123" is frequently referenced in songs, games, and educational materials to help children learn to count. It is also used in various contexts, such as phone numbers, addresses, and codes, making it a familiar sequence in everyday life.