12011002120021 has 16 divisors (see below), whose sum is σ = 12651630405120. Its totient is φ = 11387542167360.

The previous prime is 12011002120009. The next prime is 12011002120049. The reversal of 12011002120021 is 12002120011021.

It is a cyclic number.

It is not a de Polignac number, because 12011002120021 - 2⁵ = 12011002119989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12011002119983 and 12011002120010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011002100021) 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, 10670550 + ... + 11742343.

It is an arithmetic number, because the mean of its divisors is an integer number (790726900320).

Almost surely, 2^{12011002120021} is an apocalyptic number.

It is an amenable number.

12011002120021 is a deficient number, since it is larger than the sum of its proper divisors (640628285099).

12011002120021 is a wasteful number, since it uses less digits than its factorization.

12011002120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22413276.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12011002120021 its reverse (12002120011021), we get a palindrome (24013122131042).

The spelling of 12011002120021 in words is "twelve trillion, eleven billion, two million, one hundred twenty thousand, twenty-one".