12131230332 has 72 divisors (see below), whose sum is σ = 30821372400. Its totient is φ = 3711951360.

The previous prime is 12131230327. The next prime is 12131230339. The reversal of 12131230332 is 23303213121.

It is a junction number, because it is equal to n+sod(n) for n = 12131230299 and 12131230308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12131230339) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 350544 + ... + 383592.

Almost surely, 2^12131230332 is an apocalyptic number.

12131230332 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12131230332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15410686200).

12131230332 is an abundant number, since it is smaller than the sum of its proper divisors (18690142068).

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

12131230332 is a wasteful number, since it uses less digits than its factorization.

12131230332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33263 (or 33248 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 12131230332 its reverse (23303213121), we get a palindrome (35434443453).

The spelling of 12131230332 in words is "twelve billion, one hundred thirty-one million, two hundred thirty thousand, three hundred thirty-two".