13111045913081 has 2 divisors, whose sum is σ = 13111045913082. Its totient is φ = 13111045913080.

The previous prime is 13111045913071. The next prime is 13111045913167. The reversal of 13111045913081 is 18031954011131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9472489663081 + 3638556250000 = 3077741^2 + 1907500^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13111045913081 is a prime.

It is a super-2 number, since 2×13111045913081² (a number of 27 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (13111045913041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6555522956540 + 6555522956541.

It is an arithmetic number, because the mean of its divisors is an integer number (6555522956541).

Almost surely, 2^{13111045913081} is an apocalyptic number.

It is an amenable number.

13111045913081 is a deficient number, since it is larger than the sum of its proper divisors (1).

13111045913081 is an equidigital number, since it uses as much as digits as its factorization.

13111045913081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 38.

The spelling of 13111045913081 in words is "thirteen trillion, one hundred eleven billion, forty-five million, nine hundred thirteen thousand, eighty-one".