11842221 has 4 divisors (see below), whose sum is σ = 15789632. Its totient is φ = 7894812.

The previous prime is 11842189. The next prime is 11842247. The reversal of 11842221 is 12224811.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 11842221 - 2⁵ = 11842189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11842921) 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 3 ways as a sum of consecutive naturals, for example, 1973701 + ... + 1973706.

It is an arithmetic number, because the mean of its divisors is an integer number (3947408).

Almost surely, 2^11842221 is an apocalyptic number.

It is an amenable number.

11842221 is a deficient number, since it is larger than the sum of its proper divisors (3947411).

11842221 is an equidigital number, since it uses as much as digits as its factorization.

11842221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3947410.

The product of its digits is 256, while the sum is 21.

The square root of 11842221 is about 3441.2528241906. The cubic root of 11842221 is about 227.9350191859.

The spelling of 11842221 in words is "eleven million, eight hundred forty-two thousand, two hundred twenty-one".