12041221566 has 32 divisors (see below), whose sum is σ = 26416930176. Its totient is φ = 3628692000.

The previous prime is 12041221547. The next prime is 12041221589. The reversal of 12041221566 is 66512214021.

12041221566 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 492040 + ... + 515931.

It is an arithmetic number, because the mean of its divisors is an integer number (825529068).

Almost surely, 2^12041221566 is an apocalyptic number.

12041221566 is an abundant number, since it is smaller than the sum of its proper divisors (14375708610).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12041221566 is a wasteful number, since it uses less digits than its factorization.

12041221566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1008168.

The product of its (nonzero) digits is 5760, while the sum is 30.

Adding to 12041221566 its reverse (66512214021), we get a palindrome (78553435587).

The spelling of 12041221566 in words is "twelve billion, forty-one million, two hundred twenty-one thousand, five hundred sixty-six".