131121304512481 has 2 divisors, whose sum is σ = 131121304512482. Its totient is φ = 131121304512480.

The previous prime is 131121304512463. The next prime is 131121304512533. The reversal of 131121304512481 is 184215403121131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127249229030400 + 3872075482081 = 11280480^2 + 1967759^2 .

It is a cyclic number.

It is not a de Polignac number, because 131121304512481 - 2⁷ = 131121304512353 is a prime.

It is a super-2 number, since 2×131121304512481² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 131121304512481.

It is not a weakly prime, because it can be changed into another prime (131121304512881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65560652256240 + 65560652256241.

It is an arithmetic number, because the mean of its divisors is an integer number (65560652256241).

Almost surely, 2^{131121304512481} is an apocalyptic number.

It is an amenable number.

131121304512481 is a deficient number, since it is larger than the sum of its proper divisors (1).

131121304512481 is an equidigital number, since it uses as much as digits as its factorization.

131121304512481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 37.

The spelling of 131121304512481 in words is "one hundred thirty-one trillion, one hundred twenty-one billion, three hundred four million, five hundred twelve thousand, four hundred eighty-one".