21081

21081 is a natural number that lies between 21080 and 21082. In mathematics, it factors as 21081 = 3 × 7027, with 7027 being a prime number. Accordingly, its positive divisors are 1, 3, 7027, and 21081. The number is odd and not a perfect power. Its digit sum is 12, so 21081 is not a Harshad number. In common numeral systems, 21081 is represented as 0x5259 in hexadecimal and as 0101001001011001 in binary.

As a five-digit decimal, 21081 can appear in various real‑world contexts as an identifier or code. It may be used as a postal code in the United States, a catalog or part number, or a sequence label in datasets, though no single universal meaning attaches to the sequence without a specified context. Like many such numbers, its significance is determined by the system in which it is used.

Overall, 21081 is mainly notable for its elementary arithmetic properties and its representations in different bases. Without a defined context, it serves as a simple integer with a small, well-defined divisor structure: 1, 3, 7027, and 21081.