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11221211 is a prime number
BaseRepresentation
bin101010110011…
…100011011011
3210010002121102
4222303203123
510333034321
61040302015
7164243621
oct52634333
923102542
1011221211
116374731
12391190b
13242b691
1416c1511
15eb9c0b
hexab38db

11221211 has 2 divisors, whose sum is σ = 11221212. Its totient is φ = 11221210.

The previous prime is 11221193. The next prime is 11221219. The reversal of 11221211 is 11212211.

It is a m-pointer prime, because the next prime (11221219) can be obtained adding 11221211 to its product of digits (8).

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-11221211 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 11221192 and 11221201.

It is not a weakly prime, because it can be changed into another prime (11221219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5610605 + 5610606.

It is an arithmetic number, because the mean of its divisors is an integer number (5610606).

Almost surely, 211221211 is an apocalyptic number.

11221211 is a deficient number, since it is larger than the sum of its proper divisors (1).

11221211 is an equidigital number, since it uses as much as digits as its factorization.

11221211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8, while the sum is 11.

The square root of 11221211 is about 3349.8076064156. The cubic root of 11221211 is about 223.8789404851.

Adding to 11221211 its reverse (11212211), we get a palindrome (22433422).

The spelling of 11221211 in words is "eleven million, two hundred twenty-one thousand, two hundred eleven".