12021331032 has 96 divisors (see below), whose sum is σ = 33640464000. Its totient is φ = 3874106880.

The previous prime is 12021331031. The next prime is 12021331067. The reversal of 12021331032 is 23013312021.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 12021330996 and 12021331014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021331031) 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, 3187644 + ... + 3191412.

It is an arithmetic number, because the mean of its divisors is an integer number (350421500).

Almost surely, 2^12021331032 is an apocalyptic number.

12021331032 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 12021331032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16820232000).

12021331032 is an abundant number, since it is smaller than the sum of its proper divisors (21619132968).

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

12021331032 is a wasteful number, since it uses less digits than its factorization.

12021331032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5241 (or 5234 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 12021331032 its reverse (23013312021), we get a palindrome (35034643053).

The spelling of 12021331032 in words is "twelve billion, twenty-one million, three hundred thirty-one thousand, thirty-two".