12012120020 has 12 divisors (see below), whose sum is σ = 25225452084. Its totient is φ = 4804848000.

The previous prime is 12012120013. The next prime is 12012120053. The reversal of 12012120020 is 2002121021.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2978758084 + 9033361936 = 54578^2 + 95044^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12012119983 and 12012120010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 300302981 + ... + 300303020.

It is an arithmetic number, because the mean of its divisors is an integer number (2102121007).

Almost surely, 2^12012120020 is an apocalyptic number.

12012120020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12012120020 is an abundant number, since it is smaller than the sum of its proper divisors (13213332064).

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

12012120020 is a wasteful number, since it uses less digits than its factorization.

12012120020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600606010 (or 600606008 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 12012120020 its reverse (2002121021), we get a palindrome (14014241041).

The spelling of 12012120020 in words is "twelve billion, twelve million, one hundred twenty thousand, twenty".