11221143 has 8 divisors (see below), whose sum is σ = 14977008. Its totient is φ = 7473024.

The previous prime is 11221141. The next prime is 11221159. The reversal of 11221143 is 34112211.

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

It is not a de Polignac number, because 11221143 - 2¹ = 11221141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221141) 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, 4621 + ... + 6617.

It is an arithmetic number, because the mean of its divisors is an integer number (1872126).

Almost surely, 2^11221143 is an apocalyptic number.

11221143 is a deficient number, since it is larger than the sum of its proper divisors (3755865).

11221143 is a wasteful number, since it uses less digits than its factorization.

11221143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3873.

The product of its digits is 48, while the sum is 15.

The square root of 11221143 is about 3349.7974565636. The cubic root of 11221143 is about 223.8784882523.

Adding to 11221143 its reverse (34112211), we get a palindrome (45333354).

The spelling of 11221143 in words is "eleven million, two hundred twenty-one thousand, one hundred forty-three".