12131311012 has 12 divisors (see below), whose sum is σ = 21230947276. Its totient is φ = 6065326080.

The previous prime is 12131310991. The next prime is 12131311013. The reversal of 12131311012 is 21011313121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3550253056 + 8581057956 = 59584^2 + 92634^2 .

It is not an unprimeable number, because it can be changed into a prime (12131311013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12688 + ... + 156280.

Almost surely, 2^12131311012 is an apocalyptic number.

It is an amenable number.

12131311012 is a deficient number, since it is larger than the sum of its proper divisors (9099636264).

12131311012 is a wasteful number, since it uses less digits than its factorization.

12131311012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164718 (or 164716 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 12131311012 its reverse (21011313121), we get a palindrome (33142624133).

The spelling of 12131311012 in words is "twelve billion, one hundred thirty-one million, three hundred eleven thousand, twelve".