111030111161 has 2 divisors, whose sum is σ = 111030111162. Its totient is φ = 111030111160.

The previous prime is 111030111139. The next prime is 111030111209. The reversal of 111030111161 is 161111030111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90796755625 + 20233355536 = 301325^2 + 142244^2 .

It is an emirp because it is prime and its reverse (161111030111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111030111161 - 2¹⁰ = 111030110137 is a prime.

It is not a weakly prime, because it can be changed into another prime (111030110161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55515055580 + 55515055581.

It is an arithmetic number, because the mean of its divisors is an integer number (55515055581).

Almost surely, 2^111030111161 is an apocalyptic number.

It is an amenable number.

111030111161 is a deficient number, since it is larger than the sum of its proper divisors (1).

111030111161 is an equidigital number, since it uses as much as digits as its factorization.

111030111161 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 17.

Adding to 111030111161 its reverse (161111030111), we get a palindrome (272141141272).

The spelling of 111030111161 in words is "one hundred eleven billion, thirty million, one hundred eleven thousand, one hundred sixty-one".