12067766221 has 16 divisors (see below), whose sum is σ = 13889812864. Its totient is φ = 10270338624.

The previous prime is 12067766203. The next prime is 12067766233. The reversal of 12067766221 is 12266776021.

It is not a de Polignac number, because 12067766221 - 2⁵ = 12067766189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12067766281) 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, 1890391 + ... + 1896763.

It is an arithmetic number, because the mean of its divisors is an integer number (868113304).

Almost surely, 2^12067766221 is an apocalyptic number.

It is an amenable number.

12067766221 is a deficient number, since it is larger than the sum of its proper divisors (1822046643).

12067766221 is a wasteful number, since it uses less digits than its factorization.

12067766221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8260.

The product of its (nonzero) digits is 84672, while the sum is 40.

The spelling of 12067766221 in words is "twelve billion, sixty-seven million, seven hundred sixty-six thousand, two hundred twenty-one".