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21327211 is a prime number
BaseRepresentation
bin101000101011…
…0110101101011
31111010112102201
41101112311223
520424432321
62041041031
7346164313
oct121266553
944115381
1021327211
11110474a4
127186177
134559569
142b92443
151d14291
hex1456d6b

21327211 has 2 divisors, whose sum is σ = 21327212. Its totient is φ = 21327210.

The previous prime is 21327203. The next prime is 21327221. The reversal of 21327211 is 11272312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21327211 - 23 = 21327203 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (21327221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10663605 + 10663606.

It is an arithmetic number, because the mean of its divisors is an integer number (10663606).

Almost surely, 221327211 is an apocalyptic number.

21327211 is a deficient number, since it is larger than the sum of its proper divisors (1).

21327211 is an equidigital number, since it uses as much as digits as its factorization.

21327211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 168, while the sum is 19.

The square root of 21327211 is about 4618.1393439350. The cubic root of 21327211 is about 277.3179760216.

Adding to 21327211 its reverse (11272312), we get a palindrome (32599523).

The spelling of 21327211 in words is "twenty-one million, three hundred twenty-seven thousand, two hundred eleven".