12031220000 has 120 divisors (see below), whose sum is σ = 29749314672. Its totient is φ = 4788000000.

The previous prime is 12031219999. The next prime is 12031220011. The reversal of 12031220000 is 2213021.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4218575 + ... + 4221425.

Almost surely, 2^12031220000 is an apocalyptic number.

12031220000 is a gapful number since it is divisible by the number (10) 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 12031220000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14874657336).

12031220000 is an abundant number, since it is smaller than the sum of its proper divisors (17718094672).

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

12031220000 is an equidigital number, since it uses as much as digits as its factorization.

12031220000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3092 (or 3069 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 12031220000 its reverse (2213021), we get a palindrome (12033433021).

The spelling of 12031220000 in words is "twelve billion, thirty-one million, two hundred twenty thousand".