22103213221 has 4 divisors (see below), whose sum is σ = 23403402252. Its totient is φ = 20803024192.

The previous prime is 22103213191. The next prime is 22103213263. The reversal of 22103213221 is 12231230122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11290125025 + 10813088196 = 106255^2 + 103986^2 .

It is a cyclic number.

It is not a de Polignac number, because 22103213221 - 2⁵ = 22103213189 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 (22103213021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 650094490 + ... + 650094523.

It is an arithmetic number, because the mean of its divisors is an integer number (5850850563).

Almost surely, 2^22103213221 is an apocalyptic number.

It is an amenable number.

22103213221 is a deficient number, since it is larger than the sum of its proper divisors (1300189031).

22103213221 is a wasteful number, since it uses less digits than its factorization.

22103213221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1300189030.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 22103213221 its reverse (12231230122), we get a palindrome (34334443343).

The spelling of 22103213221 in words is "twenty-two billion, one hundred three million, two hundred thirteen thousand, two hundred twenty-one".