Properties of the Number 12121

Twelve Thousand One Hundred Twenty-One

Basics

Value: 12120 → 12121 → 12122

Parity: odd

Prime: No

Previous Prime: 12119

Next Prime: 12143

Digit Sum: 7

Digital Root: 7

Palindrome: Yes

Factorization: 17 × 23 × 31

Divisors: 1, 17, 23, 31, 391, 527, 713, 12121

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10111101011001

Octal: 27531

Duodecimal: 7021

Hexadecimal: 2f59

Square: 146918641

Square Root: 110.09541316512691

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

Numbers that contain only 1's and 2's. Nonempty binary strings of length n in lexicographic order. A7931

Coefficients of monic irreducible polynomials over GF(3) listed in lexicographic order. A58944

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

28-gonal numbers: a(n) = n*(13·n - 12). A161935

Number of compositions of 7·n into parts 6 and 7. A373912

Numbers in base -3. A73785

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

Integers whose decimal expansion start with 1, do not contain zeros and each successive digit to the right is at most one greater than the previous digit. A71159

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

Consider the Post tag system described in A284116 (but adapted to the alphabet {1,2}) ; sequence lists the words that terminate in the empty word. A289675