12000055000021 has 8 divisors (see below), whose sum is σ = 13092649884000. Its totient is φ = 10907740248240.

The previous prime is 12000054999967. The next prime is 12000055000093.

12000055000021 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12000055000021 - 2⁹ = 12000054999509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12000054999959 and 12000055000004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12000055007021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69943471 + ... + 70114828.

It is an arithmetic number, because the mean of its divisors is an integer number (1636581235500).

Almost surely, 2^{12000055000021} is an apocalyptic number.

12000055000021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12000055000021 is a deficient number, since it is larger than the sum of its proper divisors (1092594883979).

12000055000021 is a wasteful number, since it uses less digits than its factorization.

12000055000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140066099.

The product of its (nonzero) digits is 100, while the sum is 16.

It can be divided in two parts, 1200005 and 5000021, that added together give a palindrome (6200026).

The spelling of 12000055000021 in words is "twelve trillion, fifty-five million, twenty-one", and thus it is an aban number and an uban number.