+**123** is a [natural number](/wiki/Natural_number), the integer that follows [122](/wiki/122) and precedes [124](/wiki/124). It is also the smallest three-digit number composed of three consecutive ascending digits, often used as a placeholder or in illustrative [sequences](/wiki/Sequence).
+## See also
+- [Number](/wiki/Number)
+- [Counting](/wiki/Counting)
+- [Integer](/wiki/Integer)
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