12012020201021 has 2 divisors, whose sum is σ = 12012020201022. Its totient is φ = 12012020201020.

The previous prime is 12012020200991. The next prime is 12012020201117. The reversal of 12012020201021 is 12010202021021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6455227629796 + 5556792571225 = 2540714^2 + 2357285^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12012020201021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12012020200987 and 12012020201005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12012020801021) 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 as a sum of consecutive naturals, namely, 6006010100510 + 6006010100511.

It is an arithmetic number, because the mean of its divisors is an integer number (6006010100511).

Almost surely, 2^{12012020201021} is an apocalyptic number.

It is an amenable number.

12012020201021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12012020201021 is an equidigital number, since it uses as much as digits as its factorization.

12012020201021 is an odious number, because the sum of its binary digits is odd.

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

Adding to 12012020201021 its reverse (12010202021021), we get a palindrome (24022222222042).

The spelling of 12012020201021 in words is "twelve trillion, twelve billion, twenty million, two hundred one thousand, twenty-one".