22103221 has 4 divisors (see below), whose sum is σ = 25260832. Its totient is φ = 18945612.

The previous prime is 22103219. The next prime is 22103227. The reversal of 22103221 is 12230122.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12230122 = 2 ⋅6115061.

It is not a de Polignac number, because 22103221 - 2¹ = 22103219 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 (22103227) 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 3 ways as a sum of consecutive naturals, for example, 1578795 + ... + 1578808.

It is an arithmetic number, because the mean of its divisors is an integer number (6315208).

Almost surely, 2^22103221 is an apocalyptic number.

It is an amenable number.

22103221 is a deficient number, since it is larger than the sum of its proper divisors (3157611).

22103221 is an equidigital number, since it uses as much as digits as its factorization.

22103221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3157610.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 22103221 is about 4701.4062789765. The cubic root of 22103221 is about 280.6414756953.

Adding to 22103221 its reverse (12230122), we get a palindrome (34333343).

The spelling of 22103221 in words is "twenty-two million, one hundred three thousand, two hundred twenty-one".