21121

Prime Factor Structure

Factorization String 21121

Distinct Prime Factors 1

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 2

Divisor Sum (σ) 21,122

Proper Divisor Sum 1

Digit Sum / Digital Root 7 (Root: 7)

Adjacent Primes #21107 ← → #21139

1 21,121

Iterative sequence n → n/2 (if even) or 3n+1 (if odd):

21,121 63,364 31,682 15,841 47,524 23,762 11,881 35,644 17,822 8,911 26,734 13,367 40,102 20,051 60,154 30,077 90,232 45,116 22,558 11,279 33,838 16,919 50,758 25,379 76,138 38,069 114,208 57,104 28,552 14,276 7,138 3,569 10,708 5,354 2,677 8,032 4,016 2,008 1,004 502 251 754 377 1,132 566 283 850 425 1,276 638 319 958 479 1,438 719 2,158 1,079 3,238 1,619 4,858

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