12000066000021 has 48 divisors (see below), whose sum is σ = 19046203824960. Its totient is φ = 7220243520000.

The previous prime is 12000066000017. The next prime is 12000066000047.

It is a happy number.

12000066000021 is a `hidden beast` number, since 1 + 2 + 0 + 0 + 0 + 0 + 660 + 0 + 0 + 0 + 2 + 1 = 666.

12000066000021 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 12000066000021 - 2² = 12000066000017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12000065999958 and 12000066000003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12000066000521) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7660195 + ... + 9092783.

It is an arithmetic number, because the mean of its divisors is an integer number (396795913020).

Almost surely, 2^{12000066000021} is an apocalyptic number.

12000066000021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12000066000021 is a deficient number, since it is larger than the sum of its proper divisors (7046137824939).

12000066000021 is a wasteful number, since it uses less digits than its factorization.

12000066000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1433218 (or 1433215 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

It can be divided in two parts, 1200006 and 6000021, that added together give a palindrome (7200027).

The spelling of 12000066000021 in words is "twelve trillion, sixty-six million, twenty-one", and thus it is an aban number and an uban number.