111103311161 has 2 divisors, whose sum is σ = 111103311162. Its totient is φ = 111103311160.

The previous prime is 111103311157. The next prime is 111103311173. The reversal of 111103311161 is 161113301111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93266106025 + 17837205136 = 305395^2 + 133556^2 .

It is a cyclic number.

It is not a de Polignac number, because 111103311161 - 2² = 111103311157 is a prime.

It is not a weakly prime, because it can be changed into another prime (111103611161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55551655580 + 55551655581.

It is an arithmetic number, because the mean of its divisors is an integer number (55551655581).

Almost surely, 2^111103311161 is an apocalyptic number.

It is an amenable number.

111103311161 is a deficient number, since it is larger than the sum of its proper divisors (1).

111103311161 is an equidigital number, since it uses as much as digits as its factorization.

111103311161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54, while the sum is 20.

Adding to 111103311161 its reverse (161113301111), we get a palindrome (272216612272).

The spelling of 111103311161 in words is "one hundred eleven billion, one hundred three million, three hundred eleven thousand, one hundred sixty-one".