131115312113491 has 2 divisors, whose sum is σ = 131115312113492. Its totient is φ = 131115312113490.

The previous prime is 131115312113411. The next prime is 131115312113543. The reversal of 131115312113491 is 194311213511131.

It is a strong prime.

It is an emirp because it is prime and its reverse (194311213511131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131115312113491 - 2¹⁷ = 131115311982419 is a prime.

It is a super-2 number, since 2×131115312113491² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 131115312113491.

It is not a weakly prime, because it can be changed into another prime (131115312113411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65557656056745 + 65557656056746.

It is an arithmetic number, because the mean of its divisors is an integer number (65557656056746).

Almost surely, 2^{131115312113491} is an apocalyptic number.

131115312113491 is a deficient number, since it is larger than the sum of its proper divisors (1).

131115312113491 is an equidigital number, since it uses as much as digits as its factorization.

131115312113491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9720, while the sum is 37.

The spelling of 131115312113491 in words is "one hundred thirty-one trillion, one hundred fifteen billion, three hundred twelve million, one hundred thirteen thousand, four hundred ninety-one".