12003312121221 has 4 divisors (see below), whose sum is σ = 16004416161632. Its totient is φ = 8002208080812.

The previous prime is 12003312121117. The next prime is 12003312121253. The reversal of 12003312121221 is 12212121330021.

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.

It is not a de Polignac number, because 12003312121221 - 2¹⁴ = 12003312104837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12003312121271) 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, 2000552020201 + ... + 2000552020206.

It is an arithmetic number, because the mean of its divisors is an integer number (4001104040408).

Almost surely, 2^{12003312121221} is an apocalyptic number.

It is an amenable number.

12003312121221 is a deficient number, since it is larger than the sum of its proper divisors (4001104040411).

12003312121221 is an equidigital number, since it uses as much as digits as its factorization.

12003312121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4001104040410.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 12003312121221 its reverse (12212121330021), we get a palindrome (24215433451242).

The spelling of 12003312121221 in words is "twelve trillion, three billion, three hundred twelve million, one hundred twenty-one thousand, two hundred twenty-one".