131031043020109 has 2 divisors, whose sum is σ = 131031043020110. Its totient is φ = 131031043020108.

The previous prime is 131031043020103. The next prime is 131031043020127. The reversal of 131031043020109 is 901020340130131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90849072864484 + 40181970155625 = 9531478^2 + 6338925^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131031043020109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131031043020103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65515521510054 + 65515521510055.

It is an arithmetic number, because the mean of its divisors is an integer number (65515521510055).

Almost surely, 2^{131031043020109} is an apocalyptic number.

It is an amenable number.

131031043020109 is a deficient number, since it is larger than the sum of its proper divisors (1).

131031043020109 is an equidigital number, since it uses as much as digits as its factorization.

131031043020109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 28.

The spelling of 131031043020109 in words is "one hundred thirty-one trillion, thirty-one billion, forty-three million, twenty thousand, one hundred nine".