131021186858701 has 2 divisors, whose sum is σ = 131021186858702. Its totient is φ = 131021186858700.

The previous prime is 131021186858609. The next prime is 131021186858713. The reversal of 131021186858701 is 107858681120131.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94317097466601 + 36704089392100 = 9711699^2 + 6058390^2 .

It is a cyclic number.

It is not a de Polignac number, because 131021186858701 - 2¹³ = 131021186850509 is a prime.

It is a super-2 number, since 2×131021186858701² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131021186858791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65510593429350 + 65510593429351.

It is an arithmetic number, because the mean of its divisors is an integer number (65510593429351).

Almost surely, 2^{131021186858701} is an apocalyptic number.

It is an amenable number.

131021186858701 is a deficient number, since it is larger than the sum of its proper divisors (1).

131021186858701 is an equidigital number, since it uses as much as digits as its factorization.

131021186858701 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 645120, while the sum is 52.

The spelling of 131021186858701 in words is "one hundred thirty-one trillion, twenty-one billion, one hundred eighty-six million, eight hundred fifty-eight thousand, seven hundred one".