131206135311193 has 4 divisors (see below), whose sum is σ = 131206207374388. Its totient is φ = 131206063248000.

The previous prime is 131206135311103. The next prime is 131206135311203. The reversal of 131206135311193 is 391113531602131.

It is a happy number.

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 65371946725264 + 65834188585929 = 8085292^2 + 8113827^2 .

It is a cyclic number.

It is not a de Polignac number, because 131206135311193 - 2⁴⁵ = 96021763222361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131206135311103) 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, 33227808 + ... + 36966193.

It is an arithmetic number, because the mean of its divisors is an integer number (32801551843597).

Almost surely, 2^{131206135311193} is an apocalyptic number.

It is an amenable number.

131206135311193 is a deficient number, since it is larger than the sum of its proper divisors (72063195).

131206135311193 is an equidigital number, since it uses as much as digits as its factorization.

131206135311193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72063194.

The product of its (nonzero) digits is 43740, while the sum is 40.

The spelling of 131206135311193 in words is "one hundred thirty-one trillion, two hundred six billion, one hundred thirty-five million, three hundred eleven thousand, one hundred ninety-three".