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Default memory unit in Kubernetes is bytes, in addition to other shorter forms with one of supported suffixes: E, P, T, G, M, K, Ei, Pi, Ti, Gi, Mi, Ki.
For example: 128974848, 129e6, 129M , 123Mi
Have you ever wondered what do those suffixes mean?
A popular reference is https://medium.com/@betz.mark/understanding-resource-limits-in-kubernetes-memory-6b41e9a955f9
But the root definition is at https://en.wikipedia.org/wiki/Binary_prefix