21219553216129
This number is a prime.
2121 9553216129
Single Curio View: (Seek other curios for this number)
The least prime factor of 2^2^2^2 + 3^3^3^3. [Zhining]
Submitted: 2026-08-27 05:58:05; Last Modified: 2026-08-28 02:44:23.
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