131130121 has 2 divisors, whose sum is σ = 131130122. Its totient is φ = 131130120.

The previous prime is 131130101. The next prime is 131130127. The reversal of 131130121 is 121031131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76370121 + 54760000 = 8739^2 + 7400^2 .

It is a cyclic number.

It is not a de Polignac number, because 131130121 - 2⁵ = 131130089 is a prime.

It is not a weakly prime, because it can be changed into another prime (131130127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65565060 + 65565061.

It is an arithmetic number, because the mean of its divisors is an integer number (65565061).

Almost surely, 2^131130121 is an apocalyptic number.

It is an amenable number.

131130121 is a deficient number, since it is larger than the sum of its proper divisors (1).

131130121 is an equidigital number, since it uses as much as digits as its factorization.

131130121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 131130121 is about 11451.2060936829. The cubic root of 131130121 is about 508.0434080026.

Adding to 131130121 its reverse (121031131), we get a palindrome (252161252).

The spelling of 131130121 in words is "one hundred thirty-one million, one hundred thirty thousand, one hundred twenty-one".