111100131323161 has 2 divisors, whose sum is σ = 111100131323162. Its totient is φ = 111100131323160.

The previous prime is 111100131323081. The next prime is 111100131323173. The reversal of 111100131323161 is 161323131001111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79798131680400 + 31301999642761 = 8932980^2 + 5594819^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111100131323161 is a prime.

It is not a weakly prime, because it can be changed into another prime (111100131333161) 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, 55550065661580 + 55550065661581.

It is an arithmetic number, because the mean of its divisors is an integer number (55550065661581).

Almost surely, 2^{111100131323161} is an apocalyptic number.

It is an amenable number.

111100131323161 is a deficient number, since it is larger than the sum of its proper divisors (1).

111100131323161 is an equidigital number, since it uses as much as digits as its factorization.

111100131323161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 25.

Adding to 111100131323161 its reverse (161323131001111), we get a palindrome (272423262324272).

The spelling of 111100131323161 in words is "one hundred eleven trillion, one hundred billion, one hundred thirty-one million, three hundred twenty-three thousand, one hundred sixty-one".