12131222232 has 128 divisors (see below), whose sum is σ = 31893523200. Its totient is φ = 3840087552.

The previous prime is 12131222231. The next prime is 12131222293. The reversal of 12131222232 is 23222213121.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 12131222199 and 12131222208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12131222231) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21547183 + ... + 21547745.

It is an arithmetic number, because the mean of its divisors is an integer number (249168150).

Almost surely, 2^12131222232 is an apocalyptic number.

12131222232 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 12131222232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15946761600).

12131222232 is an abundant number, since it is smaller than the sum of its proper divisors (19762300968).

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

12131222232 is a wasteful number, since it uses less digits than its factorization.

12131222232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1057 (or 1053 counting only the distinct ones).

The product of its digits is 576, while the sum is 21.

Adding to 12131222232 its reverse (23222213121), we get a palindrome (35353435353).

The spelling of 12131222232 in words is "twelve billion, one hundred thirty-one million, two hundred twenty-two thousand, two hundred thirty-two".