111001121022173 has 2 divisors, whose sum is σ = 111001121022174. Its totient is φ = 111001121022172.

The previous prime is 111001121022167. The next prime is 111001121022293. The reversal of 111001121022173 is 371220121100111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95668782605764 + 15332338416409 = 9781042^2 + 3915653^2 .

It is a cyclic number.

It is not a de Polignac number, because 111001121022173 - 2¹² = 111001121018077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111001120022173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55500560511086 + 55500560511087.

It is an arithmetic number, because the mean of its divisors is an integer number (55500560511087).

Almost surely, 2^{111001121022173} is an apocalyptic number.

It is an amenable number.

111001121022173 is a deficient number, since it is larger than the sum of its proper divisors (1).

111001121022173 is an equidigital number, since it uses as much as digits as its factorization.

111001121022173 is an odious number, because the sum of its binary digits is odd.

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

Adding to 111001121022173 its reverse (371220121100111), we get a palindrome (482221242122284).

The spelling of 111001121022173 in words is "one hundred eleven trillion, one billion, one hundred twenty-one million, twenty-two thousand, one hundred seventy-three".