11

Properties by base:

Base 1011 (2 digits)
Digit Sum: 2
Digital Root: 2 sad
Base 20b1011 (4 digits)
Digit Sum: 0b11
Digital Root: 0b1 always happy
Base 8013 (2 digits)
Digit Sum: 04
Digital Root: 04 sad
Base 160xb (1 digit)
Digit Sum: 0xb
Digital Root: 0xb happy

More about this number at Positiv Integers and Number Empire.

The number is a prime

It is a Sophie Germain Prime since 23 is prime

It is a Safe Prime since 5 is prime

It is a Twin prime for 13.

It is a Cousin prime for 7.

It is a Sexy prime for 5 and 17.

In HTML this number represents this color:  
#00000B
 

In the work of Johann Sebastian Bach BWV 11 is Lobet Gott in seinen Reichen (Himmelfahrts-Oratorium)

The number appears at position 94 of the decimal digits of π surrounded by
862089986280348253421170679821480865132823 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: 841.034ms; cpu: 69.31ms)


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