131121123225137 has 2 divisors, whose sum is σ = 131121123225138. Its totient is φ = 131121123225136.

The previous prime is 131121123225089. The next prime is 131121123225233. The reversal of 131121123225137 is 731522321121131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126374829622336 + 4746293602801 = 11241656^2 + 2178599^2 .

It is a cyclic number.

It is not a de Polignac number, because 131121123225137 - 2²² = 131121119030833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131121123225097 and 131121123225106.

It is not a weakly prime, because it can be changed into another prime (131121123525137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65560561612568 + 65560561612569.

It is an arithmetic number, because the mean of its divisors is an integer number (65560561612569).

Almost surely, 2^{131121123225137} is an apocalyptic number.

It is an amenable number.

131121123225137 is a deficient number, since it is larger than the sum of its proper divisors (1).

131121123225137 is an equidigital number, since it uses as much as digits as its factorization.

131121123225137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 35.

Adding to 131121123225137 its reverse (731522321121131), we get a palindrome (862643444346268).

The spelling of 131121123225137 in words is "one hundred thirty-one trillion, one hundred twenty-one billion, one hundred twenty-three million, two hundred twenty-five thousand, one hundred thirty-seven".