12120012320 has 96 divisors (see below), whose sum is σ = 30923907840. Its totient is φ = 4462341120.

The previous prime is 12120012319. The next prime is 12120012323. The reversal of 12120012320 is 2321002121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12120012295 and 12120012304.

It is not an unprimeable number, because it can be changed into a prime (12120012323) 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, 738605 + ... + 754835.

It is an arithmetic number, because the mean of its divisors is an integer number (322124040).

Almost surely, 2^12120012320 is an apocalyptic number.

12120012320 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 12120012320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15461953920).

12120012320 is an abundant number, since it is smaller than the sum of its proper divisors (18803895520).

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

12120012320 is a wasteful number, since it uses less digits than its factorization.

12120012320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16618 (or 16610 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 12120012320 its reverse (2321002121), we get a palindrome (14441014441).

The spelling of 12120012320 in words is "twelve billion, one hundred twenty million, twelve thousand, three hundred twenty".