12301231666 has 8 divisors (see below), whose sum is σ = 18452832300. Its totient is φ = 6150287568.

The previous prime is 12301231643. The next prime is 12301231669. The reversal of 12301231666 is 66613210321.

It can be written as a sum of positive squares in 2 ways, for example, as 12297701025 + 3530641 = 110895^2 + 1879^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×12301231666² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12301231669) 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 3 ways as a sum of consecutive naturals, for example, 114261 + ... + 194056.

Almost surely, 2^12301231666 is an apocalyptic number.

12301231666 is a deficient number, since it is larger than the sum of its proper divisors (6151600634).

12301231666 is a wasteful number, since it uses less digits than its factorization.

12301231666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328268.

The product of its (nonzero) digits is 7776, while the sum is 31.

Adding to 12301231666 its reverse (66613210321), we get a palindrome (78914441987).

The spelling of 12301231666 in words is "twelve billion, three hundred one million, two hundred thirty-one thousand, six hundred sixty-six".