Hi Manjula,

The greatest integer that can be handled reliably by JavaScript is 9007199254740991 (Number.MAX_SAFE_INTEGER):

https://stackoverflow.com/questions/307179/what-is-javascripts-highest-integer-value-that-a-number-can-go-to-without-losin

As 11111111111111111 is greater than this greatest safe integer, using it is not supported and will likely cause unexpected behavior and results.

The developer can limit the user input in the NumericTextBox via its min and max options to avoid such issues:

https://www.telerik.com/kendo-angular-ui/components/inputs/numerictextbox/precision/#toc-value-ranges

As this is not an issue on our end, but rather a language-specific limitation, I will close this public thread.

Please do not hesitate to open a regular support thread if you have further or other questions related to using the Kendo UI for Angular components.

Regards,
Dimiter Topalov
Progress Telerik