131350035721 has 2 divisors, whose sum is σ = 131350035722. Its totient is φ = 131350035720.

The previous prime is 131350035709. The next prime is 131350035731. The reversal of 131350035721 is 127530053131.

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., 106262960400 + 25087075321 = 325980^2 + 158389^2 .

It is a cyclic number.

It is not a de Polignac number, because 131350035721 - 2⁹ = 131350035209 is a prime.

It is not a weakly prime, because it can be changed into another prime (131350035701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65675017860 + 65675017861.

It is an arithmetic number, because the mean of its divisors is an integer number (65675017861).

Almost surely, 2^131350035721 is an apocalyptic number.

It is an amenable number.

131350035721 is a deficient number, since it is larger than the sum of its proper divisors (1).

131350035721 is an equidigital number, since it uses as much as digits as its factorization.

131350035721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9450, while the sum is 31.

Adding to 131350035721 its reverse (127530053131), we get a palindrome (258880088852).

The spelling of 131350035721 in words is "one hundred thirty-one billion, three hundred fifty million, thirty-five thousand, seven hundred twenty-one".