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100211231 is a prime number
BaseRepresentation
bin1011111100100…
…01101000011111
320222120020222002
411332101220133
5201123224411
613535512515
72324532011
oct576215037
9228506862
10100211231
11516261aa
122968873b
13179b89b3
14d4481b1
158be733b
hex5f91a1f

100211231 has 2 divisors, whose sum is σ = 100211232. Its totient is φ = 100211230.

The previous prime is 100211183. The next prime is 100211233. The reversal of 100211231 is 132112001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 100211231 - 226 = 33102367 is a prime.

It is a super-2 number, since 2×1002112312 = 20084581637070722, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 100211233, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100211233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50105615 + 50105616.

It is an arithmetic number, because the mean of its divisors is an integer number (50105616).

Almost surely, 2100211231 is an apocalyptic number.

100211231 is a deficient number, since it is larger than the sum of its proper divisors (1).

100211231 is an equidigital number, since it uses as much as digits as its factorization.

100211231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 100211231 is about 10010.5559785658. Note that the first 3 decimals coincide. The cubic root of 100211231 is about 464.4854693358.

Adding to 100211231 its reverse (132112001), we get a palindrome (232323232).

The spelling of 100211231 in words is "one hundred million, two hundred eleven thousand, two hundred thirty-one".