111222111173 has 2 divisors, whose sum is σ = 111222111174. Its totient is φ = 111222111172.

The previous prime is 111222111113. The next prime is 111222111229. The reversal of 111222111173 is 371111222111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104738318689 + 6483792484 = 323633^2 + 80522^2 .

It is a cyclic number.

It is not a de Polignac number, because 111222111173 - 2⁶ = 111222111109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111222111113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55611055586 + 55611055587.

It is an arithmetic number, because the mean of its divisors is an integer number (55611055587).

Almost surely, 2^111222111173 is an apocalyptic number.

It is an amenable number.

111222111173 is a deficient number, since it is larger than the sum of its proper divisors (1).

111222111173 is an equidigital number, since it uses as much as digits as its factorization.

111222111173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 168, while the sum is 23.

Adding to 111222111173 its reverse (371111222111), we get a palindrome (482333333284).

The spelling of 111222111173 in words is "one hundred eleven billion, two hundred twenty-two million, one hundred eleven thousand, one hundred seventy-three".