12131353640566 has 16 divisors (see below), whose sum is σ = 18733445584560. Its totient is φ = 5887654296480.

The previous prime is 12131353640563. The next prime is 12131353640569. The reversal of 12131353640566 is 66504635313121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12131353640563) and next prime (12131353640569).

It is a super-3 number, since 3×12131353640566³ (a number of 40 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12131353640561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195598125 + ... + 195660136.

It is an arithmetic number, because the mean of its divisors is an integer number (1170840349035).

Almost surely, 2^{12131353640566} is an apocalyptic number.

12131353640566 is a deficient number, since it is larger than the sum of its proper divisors (6602091943994).

12131353640566 is a wasteful number, since it uses less digits than its factorization.

12131353640566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391258719.

The product of its (nonzero) digits is 1166400, while the sum is 46.

Adding to 12131353640566 its reverse (66504635313121), we get a palindrome (78635988953687).

The spelling of 12131353640566 in words is "twelve trillion, one hundred thirty-one billion, three hundred fifty-three million, six hundred forty thousand, five hundred sixty-six".