12000021020000 has 120 divisors (see below), whose sum is σ = 31792764071376. Its totient is φ = 4430776896000.

The previous prime is 12000021019957. The next prime is 12000021020047. The reversal of 12000021020000 is 2012000021.

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 12000021020000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 22816964 + ... + 23336963.

Almost surely, 2^{12000021020000} is an apocalyptic number.

12000021020000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12000021020000 is an abundant number, since it is smaller than the sum of its proper divisors (19792743051376).

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

12000021020000 is an equidigital number, since it uses as much as digits as its factorization.

12000021020000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46153970 (or 46153947 counting only the distinct ones).

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

Adding to 12000021020000 its reverse (2012000021), we get a palindrome (12002033020021).

The spelling of 12000021020000 in words is "twelve trillion, twenty-one million, twenty thousand".