12012020000 has 60 divisors (see below), whose sum is σ = 29551420206. Its totient is φ = 4804800000.

The previous prime is 12012019973. The next prime is 12012020063. The reversal of 12012020000 is 2021021.

It can be written as a sum of positive squares in 5 ways, for example, as 1342782736 + 10669237264 = 36644^2 + 103292^2 .

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a self number, because there is not a number n which added to its sum of digits gives 12012020000.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 280301 + ... + 320300.

Almost surely, 2^12012020000 is an apocalyptic number.

12012020000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12012020000 is an abundant number, since it is smaller than the sum of its proper divisors (17539400206).

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

12012020000 is an frugal number, since it uses more digits than its factorization.

12012020000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600631 (or 600608 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

Adding to 12012020000 its reverse (2021021), we get a palindrome (12014041021).

The spelling of 12012020000 in words is "twelve billion, twelve million, twenty thousand".