12000012000020 has 96 divisors (see below), whose sum is σ = 27758004462720. Its totient is φ = 4321278832640.

The previous prime is 12000012000019. The next prime is 12000012000073. The reversal of 12000012000020 is 2000021000021.

It is a junction number, because it is equal to n+sod(n) for n = 12000011999971 and 12000012000007.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65278796 + ... + 65462364.

It is an arithmetic number, because the mean of its divisors is an integer number (289145879820).

Almost surely, 2^{12000012000020} is an apocalyptic number.

12000012000020 is a gapful number since it is divisible by the number (10) 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 12000012000020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13879002231360).

12000012000020 is an abundant number, since it is smaller than the sum of its proper divisors (15757992462700).

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

12000012000020 is a wasteful number, since it uses less digits than its factorization.

12000012000020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186473 (or 186471 counting only the distinct ones).

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

Adding to 12000012000020 its reverse (2000021000021), we get a palindrome (14000033000041).

Subtracting from 12000012000020 its reverse (2000021000021), we obtain a palindrome (9999990999999).

The spelling of 12000012000020 in words is "twelve trillion, twelve million, twenty", and thus it is an aban number and an uban number.