12131085508 has 6 divisors (see below), whose sum is σ = 21229399646. Its totient is φ = 6065542752.

The previous prime is 12131085467. The next prime is 12131085529. The reversal of 12131085508 is 80558013121.

It can be written as a sum of positive squares in only one way, i.e., 10859307264 + 1271778244 = 104208^2 + 35662^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1516385685 + ... + 1516385692.

Almost surely, 2^12131085508 is an apocalyptic number.

It is an amenable number.

12131085508 is a deficient number, since it is larger than the sum of its proper divisors (9098314138).

12131085508 is a wasteful number, since it uses less digits than its factorization.

12131085508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3032771381 (or 3032771379 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 34.

Adding to 12131085508 its reverse (80558013121), we get a palindrome (92689098629).

The spelling of 12131085508 in words is "twelve billion, one hundred thirty-one million, eighty-five thousand, five hundred eight".