12123020320 has 48 divisors (see below), whose sum is σ = 29885889600. Its totient is φ = 4638371584.

The previous prime is 12123020317. The next prime is 12123020321. The reversal of 12123020320 is 2302032121.

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 = 12123020294 and 12123020303.

It is not an unprimeable number, because it can be changed into a prime (12123020321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1643470 + ... + 1650829.

It is an arithmetic number, because the mean of its divisors is an integer number (622622700).

Almost surely, 2^12123020320 is an apocalyptic number.

12123020320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12123020320 is an abundant number, since it is smaller than the sum of its proper divisors (17762869280).

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

12123020320 is a wasteful number, since it uses less digits than its factorization.

12123020320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3294337 (or 3294329 counting only the distinct ones).

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

Adding to 12123020320 its reverse (2302032121), we get a palindrome (14425052441).

The spelling of 12123020320 in words is "twelve billion, one hundred twenty-three million, twenty thousand, three hundred twenty".