12003131221 has 8 divisors (see below), whose sum is σ = 12096453600. Its totient is φ = 11910101040.

The previous prime is 12003131171. The next prime is 12003131243. The reversal of 12003131221 is 12213130021.

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

It is a cyclic number.

It is not a de Polignac number, because 12003131221 - 2²⁵ = 11969576789 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12003131195 and 12003131204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12003131321) 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, 9790 + ... + 155248.

It is an arithmetic number, because the mean of its divisors is an integer number (1512056700).

Almost surely, 2^12003131221 is an apocalyptic number.

It is an amenable number.

12003131221 is a deficient number, since it is larger than the sum of its proper divisors (93322379).

12003131221 is a wasteful number, since it uses less digits than its factorization.

12003131221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146099.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 12003131221 its reverse (12213130021), we get a palindrome (24216261242).

The spelling of 12003131221 in words is "twelve billion, three million, one hundred thirty-one thousand, two hundred twenty-one".