11221305 has 16 divisors (see below), whose sum is σ = 18899520. Its totient is φ = 5669568.

The previous prime is 11221303. The next prime is 11221307. The reversal of 11221305 is 50312211.

It is an interprime number because it is at equal distance from previous prime (11221303) and next prime (11221307).

It is not a de Polignac number, because 11221305 - 2¹ = 11221303 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (11221303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19402 + ... + 19971.

It is an arithmetic number, because the mean of its divisors is an integer number (1181220).

Almost surely, 2^11221305 is an apocalyptic number.

11221305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11221305 is a deficient number, since it is larger than the sum of its proper divisors (7678215).

11221305 is a wasteful number, since it uses less digits than its factorization.

11221305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39400.

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 11221305 is about 3349.8216370428. The cubic root of 11221305 is about 223.8795656274.

Adding to 11221305 its reverse (50312211), we get a palindrome (61533516).

The spelling of 11221305 in words is "eleven million, two hundred twenty-one thousand, three hundred five".