12012002100021 has 64 divisors (see below), whose sum is σ = 20817893099520. Its totient is φ = 5979886698240.

The previous prime is 12012002100013. The next prime is 12012002100037. The reversal of 12012002100021 is 12000120021021.

12012002100021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12012002100021 - 2³ = 12012002100013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12012002100121) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10882066 + ... + 11934963.

It is an arithmetic number, because the mean of its divisors is an integer number (325279579680).

Almost surely, 2^{12012002100021} is an apocalyptic number.

12012002100021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12012002100021 is a deficient number, since it is larger than the sum of its proper divisors (8805890999499).

12012002100021 is a wasteful number, since it uses less digits than its factorization.

12012002100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22817146.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 12012002100021 its reverse (12000120021021), we get a palindrome (24012122121042).

It can be divided in two parts, 120120021000 and 21, that added together give a palindrome (120120021021).

The spelling of 12012002100021 in words is "twelve trillion, twelve billion, two million, one hundred thousand, twenty-one".