131020204277 has 2 divisors, whose sum is σ = 131020204278. Its totient is φ = 131020204276.

The previous prime is 131020204267. The next prime is 131020204309. The reversal of 131020204277 is 772402020131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67704560401 + 63315643876 = 260201^2 + 251626^2 .

It is a cyclic number.

It is not a de Polignac number, because 131020204277 - 2²⁸ = 130751768821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131020204247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65510102138 + 65510102139.

It is an arithmetic number, because the mean of its divisors is an integer number (65510102139).

Almost surely, 2^131020204277 is an apocalyptic number.

It is an amenable number.

131020204277 is a deficient number, since it is larger than the sum of its proper divisors (1).

131020204277 is an equidigital number, since it uses as much as digits as its factorization.

131020204277 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4704, while the sum is 29.

The spelling of 131020204277 in words is "one hundred thirty-one billion, twenty million, two hundred four thousand, two hundred seventy-seven".