12321010032 has 80 divisors (see below), whose sum is σ = 34107816960. Its totient is φ = 3818822656.

The previous prime is 12321010019. The next prime is 12321010057. The reversal of 12321010032 is 23001012321.

It is a junction number, because it is equal to n+sod(n) for n = 12321009993 and 12321010020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23232 + ... + 158687.

It is an arithmetic number, because the mean of its divisors is an integer number (426347712).

Almost surely, 2^12321010032 is an apocalyptic number.

12321010032 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 12321010032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17053908480).

12321010032 is an abundant number, since it is smaller than the sum of its proper divisors (21786806928).

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

12321010032 is a wasteful number, since it uses less digits than its factorization.

12321010032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182030 (or 182024 counting only the distinct ones).

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

Adding to 12321010032 its reverse (23001012321), we get a palindrome (35322022353).

The spelling of 12321010032 in words is "twelve billion, three hundred twenty-one million, ten thousand, thirty-two".