131021711 has 2 divisors, whose sum is σ = 131021712. Its totient is φ = 131021710.

The previous prime is 131021707. The next prime is 131021741. The reversal of 131021711 is 117120131.

It is a weak prime.

It is an emirp because it is prime and its reverse (117120131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131021711 - 2² = 131021707 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131021711.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131021741) 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, 65510855 + 65510856.

It is an arithmetic number, because the mean of its divisors is an integer number (65510856).

Almost surely, 2^131021711 is an apocalyptic number.

131021711 is a deficient number, since it is larger than the sum of its proper divisors (1).

131021711 is an equidigital number, since it uses as much as digits as its factorization.

131021711 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42, while the sum is 17.

The square root of 131021711 is about 11446.4715524043. The cubic root of 131021711 is about 507.9033634665.

Adding to 131021711 its reverse (117120131), we get a palindrome (248141842).

The spelling of 131021711 in words is "one hundred thirty-one million, twenty-one thousand, seven hundred eleven".