22223123221 has 4 divisors (see below), whose sum is σ = 23932594252. Its totient is φ = 20513652192.

The previous prime is 22223123213. The next prime is 22223123239. The reversal of 22223123221 is 12232132222.

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 8213796900 + 14009326321 = 90630^2 + 118361^2 .

It is a cyclic number.

It is not a de Polignac number, because 22223123221 - 2³ = 22223123213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22223123192 and 22223123201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22223123291) 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, 854735496 + ... + 854735521.

It is an arithmetic number, because the mean of its divisors is an integer number (5983148563).

Almost surely, 2^22223123221 is an apocalyptic number.

It is an amenable number.

22223123221 is a deficient number, since it is larger than the sum of its proper divisors (1709471031).

22223123221 is a wasteful number, since it uses less digits than its factorization.

22223123221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1709471030.

The product of its digits is 1152, while the sum is 22.

Adding to 22223123221 its reverse (12232132222), we get a palindrome (34455255443).

Subtracting from 22223123221 its reverse (12232132222), we obtain a palindrome (9990990999).

The spelling of 22223123221 in words is "twenty-two billion, two hundred twenty-three million, one hundred twenty-three thousand, two hundred twenty-one".