111031100161 has 2 divisors, whose sum is σ = 111031100162. Its totient is φ = 111031100160.

The previous prime is 111031100107. The next prime is 111031100189. The reversal of 111031100161 is 161001130111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83546433936 + 27484666225 = 289044^2 + 165785^2 .

It is an emirp because it is prime and its reverse (161001130111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111031100161 - 2¹⁵ = 111031067393 is a prime.

It is not a weakly prime, because it can be changed into another prime (111031100861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55515550080 + 55515550081.

It is an arithmetic number, because the mean of its divisors is an integer number (55515550081).

Almost surely, 2^111031100161 is an apocalyptic number.

It is an amenable number.

111031100161 is a deficient number, since it is larger than the sum of its proper divisors (1).

111031100161 is an equidigital number, since it uses as much as digits as its factorization.

111031100161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 16.

Adding to 111031100161 its reverse (161001130111), we get a palindrome (272032230272).

The spelling of 111031100161 in words is "one hundred eleven billion, thirty-one million, one hundred thousand, one hundred sixty-one".