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Properties of the Number 21111

Twenty-One Thousand One Hundred Eleven

Basics

Value: 21110 → 21111 → 21112

Parity: odd

Prime: No

Previous Prime: 21107

Next Prime: 21121

Digit Sum: 6

Digital Root: 6

Palindrome: No

Factorization: 3 × 31 × 227

Divisors: 1, 3, 31, 93, 227, 681, 7037, 21111

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101001001110111

Octal: 51167

Duodecimal: 10273

Hexadecimal: 5277

Square: 445674321

Square Root: 145.29624909129623

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

Decimal encoding of the prime factorization of n: concatenation of prime factors and exponents. A67599
List of co-Lyndon words on {1,2} sorted first by length and then lexicographically. A329318
Numbers in Morse code, with 1 for a dot, 2 for a dash and 0 between digits/letters. A60109
List of primitive words over the alphabet {1,2}. A213969
Irregular triangle read by rows in which n-th row lists all partitions of n, in graded reverse lexicographic ordering, using a compressed notation. A322761
Numbers of rank 11 in the poset of lunar numbers. A191753
Nonnegative values·of solutions (x, y) to the Diophantine equation x2+(x+329)2 = y2. A205672
T(n,k)=Number of nXk 0..1 arrays with every element equal to 0, 1, 2, 3, 4, 5 or 8 king-move adjacent elements, with upper left element zero. A299740
Factorial expansion of A071156. A71158
a(n) = first term that can be reduced in n steps via repeated interpretation of a(n) as a base b+1 number where b is the largest digit of a(n), such that b is always 2 so that each interpretation is base 3. Terms already fully reduced (i.e., single digits) are excluded. A141836