12123231132 has 24 divisors (see below), whose sum is σ = 29200041472. Its totient is φ = 3910719600.

The previous prime is 12123231121. The next prime is 12123231157. The reversal of 12123231132 is 23113232121.

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 = 12123231099 and 12123231108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16294294 + ... + 16295037.

Almost surely, 2^12123231132 is an apocalyptic number.

12123231132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12123231132 is an abundant number, since it is smaller than the sum of its proper divisors (17076810340).

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

12123231132 is a wasteful number, since it uses less digits than its factorization.

12123231132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32589369 (or 32589367 counting only the distinct ones).

The product of its digits is 432, while the sum is 21.

Adding to 12123231132 its reverse (23113232121), we get a palindrome (35236463253).

The spelling of 12123231132 in words is "twelve billion, one hundred twenty-three million, two hundred thirty-one thousand, one hundred thirty-two".