Is 2121 a deficient number and what is its deficiency?

Is 2121 a deficient number?

Here we will explain and calculate if 2121 is a deficient number and its deficiency if applicable.

2121 is a deficient number if the sum of its proper divisors is less than 2121.

The sum of its proper divisors is calculated as follows: 1 + 3 + 7 + 21 + 101 + 303 + 707 = 1143.

1143 is less than 2121. Therefore, 2121 is a deficient number.

The deficiency of 2121 is 2121 minus the sum of its proper divisors. Thus, the deficiency of 2121 is 2121 - 1143 = 978

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