131311123212131 has 4 divisors (see below), whose sum is σ = 131311198066752. Its totient is φ = 131311048357512.

The previous prime is 131311123212083. The next prime is 131311123212151. The reversal of 131311123212131 is 131212321113131.

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

It is a cyclic number.

It is not a de Polignac number, because 131311123212131 - 2⁶ = 131311123212067 is a prime.

It is a super-2 number, since 2×131311123212131² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131311123212131.

It is not an unprimeable number, because it can be changed into a prime (131311123212151) 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, 34731251 + ... + 38325996.

It is an arithmetic number, because the mean of its divisors is an integer number (32827799516688).

Almost surely, 2^{131311123212131} is an apocalyptic number.

131311123212131 is a deficient number, since it is larger than the sum of its proper divisors (74854621).

131311123212131 is an equidigital number, since it uses as much as digits as its factorization.

131311123212131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74854620.

The product of its digits is 648, while the sum is 26.

Adding to 131311123212131 its reverse (131212321113131), we get a palindrome (262523444325262).

The spelling of 131311123212131 in words is "one hundred thirty-one trillion, three hundred eleven billion, one hundred twenty-three million, two hundred twelve thousand, one hundred thirty-one".