12003031211321 has 4 divisors (see below), whose sum is σ = 12003836961012. Its totient is φ = 12002225461632.

The previous prime is 12003031211317. The next prime is 12003031211329. The reversal of 12003031211321 is 12311213030021.

It is a happy number.

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 10884225765625 + 1118805445696 = 3299125^2 + 1057736^2 .

It is a cyclic number.

It is not a de Polignac number, because 12003031211321 - 2² = 12003031211317 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12003031211293 and 12003031211302.

It is not an unprimeable number, because it can be changed into a prime (12003031211329) 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, 402852500 + ... + 402882293.

It is an arithmetic number, because the mean of its divisors is an integer number (3000959240253).

Almost surely, 2^{12003031211321} is an apocalyptic number.

It is an amenable number.

12003031211321 is a deficient number, since it is larger than the sum of its proper divisors (805749691).

12003031211321 is an equidigital number, since it uses as much as digits as its factorization.

12003031211321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805749690.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 12003031211321 its reverse (12311213030021), we get a palindrome (24314244241342).

The spelling of 12003031211321 in words is "twelve trillion, three billion, thirty-one million, two hundred eleven thousand, three hundred twenty-one".