111103611161 has 2 divisors, whose sum is σ = 111103611162. Its totient is φ = 111103611160.

The previous prime is 111103611133. The next prime is 111103611181. The reversal of 111103611161 is 161116301111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101239148761 + 9864462400 = 318181^2 + 99320^2 .

It is an emirp because it is prime and its reverse (161116301111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111103611161 - 2¹⁸ = 111103349017 is a prime.

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 (111103611181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55551805580 + 55551805581.

It is an arithmetic number, because the mean of its divisors is an integer number (55551805581).

Almost surely, 2^111103611161 is an apocalyptic number.

It is an amenable number.

111103611161 is a deficient number, since it is larger than the sum of its proper divisors (1).

111103611161 is an equidigital number, since it uses as much as digits as its factorization.

111103611161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 23.

Adding to 111103611161 its reverse (161116301111), we get a palindrome (272219912272).

The spelling of 111103611161 in words is "one hundred eleven billion, one hundred three million, six hundred eleven thousand, one hundred sixty-one".