12026505667221 has 8 divisors (see below), whose sum is σ = 17817045432960. Its totient is φ = 8017670444796.

The previous prime is 12026505667213. The next prime is 12026505667223. The reversal of 12026505667221 is 12276650562021.

12026505667221 is a `hidden beast` number, since 1 + 2 + 0 + 2 + 65 + 0 + 566 + 7 + 2 + 21 = 666.

It is not a de Polignac number, because 12026505667221 - 2³ = 12026505667213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12026505667223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 222713067885 + ... + 222713067938.

It is an arithmetic number, because the mean of its divisors is an integer number (2227130679120).

Almost surely, 2^{12026505667221} is an apocalyptic number.

It is an amenable number.

12026505667221 is a deficient number, since it is larger than the sum of its proper divisors (5790539765739).

12026505667221 is an equidigital number, since it uses as much as digits as its factorization.

12026505667221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445426135832 (or 445426135826 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 45.

The spelling of 12026505667221 in words is "twelve trillion, twenty-six billion, five hundred five million, six hundred sixty-seven thousand, two hundred twenty-one".