2012120320 has 144 divisors (see below), whose sum is σ = 5621817600. Its totient is φ = 689719296.

The previous prime is 2012120263. The next prime is 2012120329. The reversal of 2012120320 is 230212102.

It is a self number, because there is not a number n which added to its sum of digits gives 2012120320.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2012120329) 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, 436749 + ... + 441331.

It is an arithmetic number, because the mean of its divisors is an integer number (39040400).

Almost surely, 2^2012120320 is an apocalyptic number.

2012120320 is a gapful number since it is divisible by the number (20) 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 2012120320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2810908800).

2012120320 is an abundant number, since it is smaller than the sum of its proper divisors (3609697280).

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

2012120320 is an frugal number, since it uses more digits than its factorization.

2012120320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4625 (or 4597 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 2012120320 is about 44856.6641648708. The cubic root of 2012120320 is about 1262.4610335978.

Adding to 2012120320 its reverse (230212102), we get a palindrome (2242332422).

The spelling of 2012120320 in words is "two billion, twelve million, one hundred twenty thousand, three hundred twenty".