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11100221 = 112773643
BaseRepresentation
bin101010010110…
…000000111101
3202212221122022
4222112000331
510320201341
61033525525
7163231106
oct52260075
922787568
1011100221
1162a1840
1238738a5
1323b85a2
14168d3ad
15e93e4b
hexa9603d

11100221 has 8 divisors (see below), whose sum is σ = 12156384. Its totient is φ = 10051920.

The previous prime is 11100179. The next prime is 11100223. The reversal of 11100221 is 12200111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11100221 - 210 = 11099197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11100199 and 11100208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11100223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1226 + ... + 4868.

It is an arithmetic number, because the mean of its divisors is an integer number (1519548).

Almost surely, 211100221 is an apocalyptic number.

11100221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11100221 is a deficient number, since it is larger than the sum of its proper divisors (1056163).

11100221 is a wasteful number, since it uses less digits than its factorization.

11100221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3931.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 11100221 is about 3331.6994162139. The cubic root of 11100221 is about 223.0713908717.

Adding to 11100221 its reverse (12200111), we get a palindrome (23300332).

The spelling of 11100221 in words is "eleven million, one hundred thousand, two hundred twenty-one".

Divisors: 1 11 277 3047 3643 40073 1009111 11100221