111243350161 has 2 divisors, whose sum is σ = 111243350162. Its totient is φ = 111243350160.

The previous prime is 111243350123. The next prime is 111243350171. The reversal of 111243350161 is 161053342111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94331908225 + 16911441936 = 307135^2 + 130044^2 .

It is a cyclic number.

It is not a de Polignac number, because 111243350161 - 2¹⁷ = 111243219089 is a prime.

It is not a weakly prime, because it can be changed into another prime (111243350111) 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, 55621675080 + 55621675081.

It is an arithmetic number, because the mean of its divisors is an integer number (55621675081).

Almost surely, 2^111243350161 is an apocalyptic number.

It is an amenable number.

111243350161 is a deficient number, since it is larger than the sum of its proper divisors (1).

111243350161 is an equidigital number, since it uses as much as digits as its factorization.

111243350161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 28.

Adding to 111243350161 its reverse (161053342111), we get a palindrome (272296692272).

The spelling of 111243350161 in words is "one hundred eleven billion, two hundred forty-three million, three hundred fifty thousand, one hundred sixty-one".