12131311001 has 4 divisors (see below), whose sum is σ = 12549632100. Its totient is φ = 11712989904.

The previous prime is 12131310991. The next prime is 12131311013. The reversal of 12131311001 is 10011313121.

It is a happy number.

12131311001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6438457600 + 5692853401 = 80240^2 + 75451^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12131311001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12131311201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209160506 + ... + 209160563.

It is an arithmetic number, because the mean of its divisors is an integer number (3137408025).

Almost surely, 2^12131311001 is an apocalyptic number.

It is an amenable number.

12131311001 is a deficient number, since it is larger than the sum of its proper divisors (418321099).

12131311001 is an equidigital number, since it uses as much as digits as its factorization.

12131311001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418321098.

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 12131311001 its reverse (10011313121), we get a palindrome (22142624122).

The spelling of 12131311001 in words is "twelve billion, one hundred thirty-one million, three hundred eleven thousand, one".