Properties of the Number 12221

Twelve Thousand Two Hundred Twenty-One

Basics

Value: 12220 → 12221 → 12222

Parity: odd

Prime: No

Previous Prime: 12211

Next Prime: 12227

Digit Sum: 8

Digital Root: 8

Palindrome: Yes

Factorization: 11 ² × 101

Divisors: 1, 11, 101, 121, 1111, 12221

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10111110111101

Octal: 27675

Duodecimal: 70A5

Hexadecimal: 2fbd

Square: 149352841

Square Root: 110.54863183232979

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Positive numbers for which the sum of digits equals the product of digits. A34710

Nonnegative integers in balanced ternary representation (with 2 standing for -1 digit). A140267

Palindromes in base 3 (written in base 3). A118594

Numbers that are the sum of 3 positive cubes in 3 or more ways. A25398

Numbers in base -3. A73785

List of primitive words over the alphabet {1,2}. A213969

Unary-binary representation of Stern polynomials: a(n) = A156552(A260443(n)). A277020

a(n) = n³ * ∑_{p∣n, p prime} 1/p³. A351242

a(1) = 1, a(n) = smallest palindromic multiple of a(n-1) obtained by inserting digits anywhere in a(n-1). A82776

Palindromes in base 4 (written in base 4). A118595