12021166567 has 2 divisors, whose sum is σ = 12021166568. Its totient is φ = 12021166566.

The previous prime is 12021166477. The next prime is 12021166589. The reversal of 12021166567 is 76566112021.

It is a happy number.

12021166567 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12021166567 - 2¹⁵ = 12021133799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12021166967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010583283 + 6010583284.

It is an arithmetic number, because the mean of its divisors is an integer number (6010583284).

Almost surely, 2^12021166567 is an apocalyptic number.

12021166567 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021166567 is an equidigital number, since it uses as much as digits as its factorization.

12021166567 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 37.

Adding to 12021166567 its reverse (76566112021), we get a palindrome (88587278588).

The spelling of 12021166567 in words is "twelve billion, twenty-one million, one hundred sixty-six thousand, five hundred sixty-seven".