11221387 has 8 divisors (see below), whose sum is σ = 11545200. Its totient is φ = 10902144.

The previous prime is 11221373. The next prime is 11221393. The reversal of 11221387 is 78312211.

It is a happy number.

11221387 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 11221387 - 2¹¹ = 11219339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11221307) 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 7 ways as a sum of consecutive naturals, for example, 4183 + ... + 6319.

It is an arithmetic number, because the mean of its divisors is an integer number (1443150).

Almost surely, 2^11221387 is an apocalyptic number.

11221387 is a deficient number, since it is larger than the sum of its proper divisors (323813).

11221387 is an equidigital number, since it uses as much as digits as its factorization.

11221387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2285.

The product of its digits is 672, while the sum is 25.

The square root of 11221387 is about 3349.8338764781. The cubic root of 11221387 is about 223.8801109615.

Adding to 11221387 its reverse (78312211), we get a palindrome (89533598).

The spelling of 11221387 in words is "eleven million, two hundred twenty-one thousand, three hundred eighty-seven".