12031003221 has 16 divisors (see below), whose sum is σ = 16310354880. Its totient is φ = 7886257920.

The previous prime is 12031003181. The next prime is 12031003267. The reversal of 12031003221 is 12230013021.

It is not a de Polignac number, because 12031003221 - 2¹⁵ = 12030970453 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12031003221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12031003421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 554646 + ... + 575928.

It is an arithmetic number, because the mean of its divisors is an integer number (1019397180).

Almost surely, 2^12031003221 is an apocalyptic number.

It is an amenable number.

12031003221 is a deficient number, since it is larger than the sum of its proper divisors (4279351659).

12031003221 is a wasteful number, since it uses less digits than its factorization.

12031003221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24436.

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

Adding to 12031003221 its reverse (12230013021), we get a palindrome (24261016242).

The spelling of 12031003221 in words is "twelve billion, thirty-one million, three thousand, two hundred twenty-one".