12001200020000 has 60 divisors (see below), whose sum is σ = 29524752278406. Its totient is φ = 4800480000000.

The previous prime is 12001200019999. The next prime is 12001200020009. The reversal of 12001200020000 is 2000210021.

It can be written as a sum of positive squares in 5 ways, for example, as 520135209616 + 11481064810384 = 721204^2 + 3388372^2 .

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 12001200020000.

It is not an unprimeable number, because it can be changed into a prime (12001200020009) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 300010001 + ... + 300050000.

Almost surely, 2^{12001200020000} is an apocalyptic number.

12001200020000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12001200020000 is an abundant number, since it is smaller than the sum of its proper divisors (17523552258406).

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

12001200020000 is an frugal number, since it uses more digits than its factorization.

12001200020000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600060031 (or 600060008 counting only the distinct ones).

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

Adding to 12001200020000 its reverse (2000210021), we get a palindrome (12003200230021).

The spelling of 12001200020000 in words is "twelve trillion, one billion, two hundred million, twenty thousand".