Number 1221

Interestingness: 7 · Rank #757 of 1000

Visual representations

Binary image (n×n bits)
31137
Prime factorization

Representations of 1221

͵ασκαʹ
१२२१
١٢٢١
MCCXXI
●●●


一千二百二十一
א׳ רכא
𓆼
𓈖𓈖
𓎆𓎆
𓏹
.----..---..---.----

1221 in different numeral systems

Binary
10011000101
Base-3
Base-4
Base-5
Base-6
Base-7
Base-8
Duodecimal
Hex
4c5
Vigesimal
Base-24
22l
Base-36
xx
Negabinary
10111000101

Factorization

Prime factors: 3, 11, 37
Divisors: 1, 3, 11, 33, 37, 111, 407, 1221
Sum of divisors other than 1221: 603
Product of prime factors: 1221 = 3 × 11 × 37

Number-theory characteristics (5)

Difference of 2 squares Odious number Odd Composite Deficient

Base-10 digit properties (2)

These depend on the decimal representation of the number.

Palindromic Happy number

Related primes

Number 1221 prime
Prime number before 1221
Prime number after 1221