12001241566 has 16 divisors (see below), whose sum is σ = 18378258480. Its totient is φ = 5875947520.

The previous prime is 12001241557. The next prime is 12001241573. The reversal of 12001241566 is 66514210021.

It is a super-2 number, since 2×12001241566² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 167545 + ... + 228196.

It is an arithmetic number, because the mean of its divisors is an integer number (1148641155).

Almost surely, 2^12001241566 is an apocalyptic number.

12001241566 is a deficient number, since it is larger than the sum of its proper divisors (6377016914).

12001241566 is a wasteful number, since it uses less digits than its factorization.

12001241566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396059.

The product of its (nonzero) digits is 2880, while the sum is 28.

Adding to 12001241566 its reverse (66514210021), we get a palindrome (78515451587).

The spelling of 12001241566 in words is "twelve billion, one million, two hundred forty-one thousand, five hundred sixty-six".