2121

Properties by base:

More about this number at Positiv Integers and Number Empire.

The number is not a prime.

Its 3 (3 unique) factors are:
3
7
101

Its 8 divisors are:
1
3
7
21
101
303
707
2121
Its aliquote sum is:
1143
makeing it a deficient number.

As Unicode codepoint (since version 6.0) this number represents this character:ࡉ MANDAIC LETTER AKSA in Mandaic (Source: https://ucdapi.org/unicode/latest/codepoint/dec/2121); HTML: ࡉ

The number appears at position 33803 of the decimal digits of π surrounded by
85044527182892749689212106670081648583395537 Source: The Pi-Search Page

Computations done with Math::BigInt 1.999811 and Math::Pari 2.030523 based on PARI/GP 2.11.3 (elapsed: 861.03ms; cpu: 88.8100000000005ms)