12031221232 has 20 divisors (see below), whose sum is σ = 24681697056. Its totient is φ = 5661751040.

The previous prime is 12031221227. The next prime is 12031221239. The reversal of 12031221232 is 23212213021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12031221239) 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, 22115944 + ... + 22116487.

Almost surely, 2^12031221232 is an apocalyptic number.

It is an amenable number.

12031221232 is an abundant number, since it is smaller than the sum of its proper divisors (12650475824).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12031221232 is a wasteful number, since it uses less digits than its factorization.

12031221232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44232456 (or 44232450 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 12031221232 its reverse (23212213021), we get a palindrome (35243434253).

The spelling of 12031221232 in words is "twelve billion, thirty-one million, two hundred twenty-one thousand, two hundred thirty-two".