12203111321 has 4 divisors (see below), whose sum is σ = 12203618832. Its totient is φ = 12202603812.

The previous prime is 12203111293. The next prime is 12203111329. The reversal of 12203111321 is 12311130221.

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: 12311130221 = 13 ⋅947010017.

It is a cyclic number.

It is not a de Polignac number, because 12203111321 - 2¹⁸ = 12202849177 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12203111321.

It is not an unprimeable number, because it can be changed into a prime (12203111329) 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, 215795 + ... + 266408.

It is an arithmetic number, because the mean of its divisors is an integer number (3050904708).

Almost surely, 2^12203111321 is an apocalyptic number.

It is an amenable number.

12203111321 is a deficient number, since it is larger than the sum of its proper divisors (507511).

12203111321 is an equidigital number, since it uses as much as digits as its factorization.

12203111321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507510.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 12203111321 its reverse (12311130221), we get a palindrome (24514241542).

The spelling of 12203111321 in words is "twelve billion, two hundred three million, one hundred eleven thousand, three hundred twenty-one".