12002120021021 has 16 divisors (see below), whose sum is σ = 13116138391104. Its totient is φ = 10916362013184.

The previous prime is 12002120020997. The next prime is 12002120021027. The reversal of 12002120021021 is 12012002120021.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12002120021021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12002120020987 and 12002120021005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12002120021027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20678375 + ... + 21250868.

It is an arithmetic number, because the mean of its divisors is an integer number (819758649444).

Almost surely, 2^{12002120021021} is an apocalyptic number.

It is an amenable number.

12002120021021 is a deficient number, since it is larger than the sum of its proper divisors (1114018370083).

12002120021021 is a wasteful number, since it uses less digits than its factorization.

12002120021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41929580.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 12002120021021 its reverse (12012002120021), we get a palindrome (24014122141042).

The spelling of 12002120021021 in words is "twelve trillion, two billion, one hundred twenty million, twenty-one thousand, twenty-one".