1313323320181 has 2 divisors, whose sum is σ = 1313323320182. Its totient is φ = 1313323320180.

The previous prime is 1313323320161. The next prime is 1313323320217. The reversal of 1313323320181 is 1810233233131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1279916619556 + 33406700625 = 1131334^2 + 182775^2 .

It is a cyclic number.

It is not a de Polignac number, because 1313323320181 - 2²¹ = 1313321223029 is a prime.

It is a super-2 number, since 2×1313323320181² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1313323320161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656661660090 + 656661660091.

It is an arithmetic number, because the mean of its divisors is an integer number (656661660091).

Almost surely, 2^{1313323320181} is an apocalyptic number.

It is an amenable number.

1313323320181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313323320181 is an equidigital number, since it uses as much as digits as its factorization.

1313323320181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 31.

The spelling of 1313323320181 in words is "one trillion, three hundred thirteen billion, three hundred twenty-three million, three hundred twenty thousand, one hundred eighty-one".