12031220032 has 112 divisors (see below), whose sum is σ = 26756595712. Its totient is φ = 5329981440.

The previous prime is 12031220027. The next prime is 12031220039. The reversal of 12031220032 is 23002213021.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 12031219988 and 12031220015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12031220039) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3273748 + ... + 3277420.

It is an arithmetic number, because the mean of its divisors is an integer number (238898176).

Almost surely, 2^12031220032 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12031220032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13378297856).

12031220032 is an abundant number, since it is smaller than the sum of its proper divisors (14725375680).

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

12031220032 is a wasteful number, since it uses less digits than its factorization.

12031220032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3856 (or 3846 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 12031220032 its reverse (23002213021), we get a palindrome (35033433053).

The spelling of 12031220032 in words is "twelve billion, thirty-one million, two hundred twenty thousand, thirty-two".