12003031221 has 8 divisors (see below), whose sum is σ = 16344553344. Its totient is φ = 7831764960.

The previous prime is 12003031217. The next prime is 12003031231. The reversal of 12003031221 is 12213030021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12003031221 - 2² = 12003031217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12003031221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12003031231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42563800 + ... + 42564081.

It is an arithmetic number, because the mean of its divisors is an integer number (2043069168).

Almost surely, 2^12003031221 is an apocalyptic number.

It is an amenable number.

12003031221 is a deficient number, since it is larger than the sum of its proper divisors (4341522123).

12003031221 is an equidigital number, since it uses as much as digits as its factorization.

12003031221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85127931.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 12003031221 its reverse (12213030021), we get a palindrome (24216061242).

The spelling of 12003031221 in words is "twelve billion, three million, thirty-one thousand, two hundred twenty-one".