19212012

19212012 is an eight-digit integer in base ten. It can be read as the concatenation of the years 1921 and 2012, a feature that has made it a convenient example in discussions of digit pairing and year-based patterns in numbers. Beyond its appearance, it is a composite number with several small factors.

Mathematical properties and factorization: The number is even, and its digits sum to 18, which makes it divisible by 9. Since the last digit is 2, it is also divisible by 2, hence by 18. The last two digits form 12, which means it is divisible by 4 as well. The number can be expressed as 19212012 = 108 × 177,889, which corresponds to the prime-power product 2^2 × 3^3 × 177,889. The cofactor 177,889 is a larger component whose primality or further factorization requires more extensive testing; it does not have small prime divisors among common checks, but its complete factorization is not widely documented.

Context and usage: As a numeric pattern, 19212012 is sometimes cited in puzzles or illustrative problems that involve concatenation of year-like numbers. In general, eight-digit numbers that embed recognizable sub-numbers or year pairs can appear as identifiers, codes, or placeholders in datasets and cataloging schemes. There is no widely documented historical event, organization, or cultural artifact specifically associated with the term “19212012.”