131311331113 has 4 divisors (see below), whose sum is σ = 134514046548. Its totient is φ = 128108615680.

The previous prime is 131311331093. The next prime is 131311331119. The reversal of 131311331113 is 311133113131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 311133113131 = 29 ⋅10728728039.

It can be written as a sum of positive squares in 2 ways, for example, as 41735629849 + 89575701264 = 204293^2 + 299292^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131311331113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131311331119) 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, 1601357656 + ... + 1601357737.

It is an arithmetic number, because the mean of its divisors is an integer number (33628511637).

Almost surely, 2^131311331113 is an apocalyptic number.

It is an amenable number.

131311331113 is a deficient number, since it is larger than the sum of its proper divisors (3202715435).

131311331113 is an equidigital number, since it uses as much as digits as its factorization.

131311331113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3202715434.

The product of its digits is 243, while the sum is 22.

Adding to 131311331113 its reverse (311133113131), we get a palindrome (442444444244).

The spelling of 131311331113 in words is "one hundred thirty-one billion, three hundred eleven million, three hundred thirty-one thousand, one hundred thirteen".