12131043136 has 14 divisors (see below), whose sum is σ = 24072538850. Its totient is φ = 6065521536.

The previous prime is 12131043131. The next prime is 12131043143. The reversal of 12131043136 is 63134013121.

It can be written as a sum of positive squares in only one way, i.e., 8537760000 + 3593283136 = 92400^2 + 59944^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12131043136.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12131043131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94773711 + ... + 94773838.

Almost surely, 2^12131043136 is an apocalyptic number.

12131043136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12131043136 is a deficient number, since it is larger than the sum of its proper divisors (11941495714).

12131043136 is an equidigital number, since it uses as much as digits as its factorization.

12131043136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189547561 (or 189547551 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 12131043136 its reverse (63134013121), we get a palindrome (75265056257).

The spelling of 12131043136 in words is "twelve billion, one hundred thirty-one million, forty-three thousand, one hundred thirty-six".