12012203321 has 4 divisors (see below), whose sum is σ = 12013591632. Its totient is φ = 12010815012.

The previous prime is 12012203311. The next prime is 12012203327. The reversal of 12012203321 is 12330221021.

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: 12330221021 = 191 ⋅64556131.

It is a cyclic number.

It is not a de Polignac number, because 12012203321 - 2¹⁰ = 12012202297 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 12012203321.

It is not an unprimeable number, because it can be changed into a prime (12012203327) 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, 681095 + ... + 698508.

It is an arithmetic number, because the mean of its divisors is an integer number (3003397908).

Almost surely, 2^12012203321 is an apocalyptic number.

It is an amenable number.

12012203321 is a deficient number, since it is larger than the sum of its proper divisors (1388311).

12012203321 is an equidigital number, since it uses as much as digits as its factorization.

12012203321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1388310.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 12012203321 its reverse (12330221021), we get a palindrome (24342424342).

The spelling of 12012203321 in words is "twelve billion, twelve million, two hundred three thousand, three hundred twenty-one".