131321020121171 has 2 divisors, whose sum is σ = 131321020121172. Its totient is φ = 131321020121170.

The previous prime is 131321020121113. The next prime is 131321020121189. The reversal of 131321020121171 is 171121020123131.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131321020121171 is a prime.

It is a super-2 number, since 2×131321020121171² (a number of 29 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131321020121171.

It is not a weakly prime, because it can be changed into another prime (131321020121671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65660510060585 + 65660510060586.

It is an arithmetic number, because the mean of its divisors is an integer number (65660510060586).

Almost surely, 2^{131321020121171} is an apocalyptic number.

131321020121171 is a deficient number, since it is larger than the sum of its proper divisors (1).

131321020121171 is an equidigital number, since it uses as much as digits as its factorization.

131321020121171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 26.

The spelling of 131321020121171 in words is "one hundred thirty-one trillion, three hundred twenty-one billion, twenty million, one hundred twenty-one thousand, one hundred seventy-one".