12223203021 has 24 divisors (see below), whose sum is σ = 18338363680. Its totient is φ = 8136024912.

The previous prime is 12223202947. The next prime is 12223203059. The reversal of 12223203021 is 12030232221.

It is not a de Polignac number, because 12223203021 - 2¹⁴ = 12223186637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12223202985 and 12223203003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12223203121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 117135 + ... + 195363.

Almost surely, 2^12223203021 is an apocalyptic number.

It is an amenable number.

12223203021 is a deficient number, since it is larger than the sum of its proper divisors (6115160659).

12223203021 is an frugal number, since it uses more digits than its factorization.

12223203021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78887 (or 78875 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 12223203021 its reverse (12030232221), we get a palindrome (24253435242).

The spelling of 12223203021 in words is "twelve billion, two hundred twenty-three million, two hundred three thousand, twenty-one".