1212
1212 is the year of the Children's Crusade.
- Even
- Composite
Where 1212 fits
Why 1212 is special
The traditional account of thousands of children marching to the Holy Land is largely legendary; contemporary sources describe movements of poor people, and the word for child in the sources also meant landless labourer.
1212 is part of
Factors & digit properties
- Divisors (12)
- 1, 2, 3, 4, 6, 12, 101, 202, 303, 404, 606, 1212
- Prime factorisation
- 2^2 × 3 × 101
- Digit sum
- 6
- Digital root
- 6
Representations
- Decimal
- 1212
- Scientific notation
- 1.212 × 10^3
Roman numerals
M C C X I I
Binary
1 0 0 1 0 1 1 1 1 0 0
1 × 1,024 + 0 × 512 + 0 × 256 + 1 × 128 + 0 × 64 + 1 × 32 + 1 × 16 + 1 × 8 + 1 × 4 + 0 × 2 + 0 × 1 = 1,212
Octal
2 2 7 4
2 × 512 + 2 × 64 + 7 × 8 + 4 × 1 = 1,212
Hexadecimal
4 b c
4 × 256 + b × 16 + c × 1 = 1,212
Read as powers of two: 1,024 + 128 + 32 + 16 + 8 + 4 = 1,212.
In historical numeral systems
Egyptian
1 lotus, 2 coils of rope, 1 hobble, 2 strokes
1 × 1,000 + 2 × 100 + 1 × 10 + 2 × 1 = 1,212. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
2 corner wedges (sixties place), 1 corner wedge + 2 vertical wedges (units place)
20 × 60 + 12 = 1212. Places are separated by a space on the tablet, with the higher place written first.
Systems that simply cannot reach this value are left out. Where a script needs a font most readers do not have, the reading is given instead of the glyphs — see number systems for each system in full.
Other mathematical patterns
- Abundant number
- Happy number
- Harshad (Niven) number
Related numbers & connections
1212 is a year in the 13th century, in the 1210s.
The First Crusade of 1096 was an organised military expedition; the Children's Crusade of 1212 was probably a movement of the poor, its name resting on a Latin word meaning both boy and landless labourer.
View 1096 →Numbers Around Us
- appears inHistorical years
why?
Strength 0.50, confidence "high".
Other connections
- contrasts with1096
why?
Strength 0.50, confidence "high".
History
In 1212, the Christian victory at Las Navas de Tolosa broke Almohad power in Iberia (Iberia).
DocumentedHistoryGeography: IberiaPeriod: 1212The Children's Crusade of 1212 probably involved poor adults rather than children — the Latin puer meant both 'boy' and 'landless worker'. A translation ambiguity produced one of the medieval period's most repeated stories.
DocumentedHistoryGeography: France and GermanyPeriod: 1212
Common questions
Is 1212 a prime number?
No, 1212 is not prime.
What are the factors of 1212?
The factors of 1212 are 1, 2, 3, 4, 6, 12, 101, 202, 303, 404, 606, 1212.
What is 1212 in Roman numerals?
1212 in Roman numerals is MCCXII.
About this page's data
Mathematical facts:computed directly from the number's value — nothing to source or verify externally.
Contextual records: 2 reviewer-confirmed records, sourced and reviewed before publication.
Last reviewed: 15 July 2026