131201322121 has 2 divisors, whose sum is σ = 131201322122. Its totient is φ = 131201322120.

The previous prime is 131201322097. The next prime is 131201322137. The reversal of 131201322121 is 121223102131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91407056896 + 39794265225 = 302336^2 + 199485^2 .

It is a cyclic number.

It is not a de Polignac number, because 131201322121 - 2²³ = 131192933513 is a prime.

It is not a weakly prime, because it can be changed into another prime (131201322191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65600661060 + 65600661061.

It is an arithmetic number, because the mean of its divisors is an integer number (65600661061).

Almost surely, 2^131201322121 is an apocalyptic number.

It is an amenable number.

131201322121 is a deficient number, since it is larger than the sum of its proper divisors (1).

131201322121 is an equidigital number, since it uses as much as digits as its factorization.

131201322121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 131201322121 its reverse (121223102131), we get a palindrome (252424424252).

The spelling of 131201322121 in words is "one hundred thirty-one billion, two hundred one million, three hundred twenty-two thousand, one hundred twenty-one".