11111100122173 has 2 divisors, whose sum is σ = 11111100122174. Its totient is φ = 11111100122172.

The previous prime is 11111100122117. The next prime is 11111100122207. The reversal of 11111100122173 is 37122100111111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10650836927844 + 460263194329 = 3263562^2 + 678427^2 .

It is a cyclic number.

It is not a de Polignac number, because 11111100122173 - 2³³ = 11102510187581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11111100122273) 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, 5555550061086 + 5555550061087.

It is an arithmetic number, because the mean of its divisors is an integer number (5555550061087).

Almost surely, 2^{11111100122173} is an apocalyptic number.

It is an amenable number.

11111100122173 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111100122173 is an equidigital number, since it uses as much as digits as its factorization.

11111100122173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84, while the sum is 22.

Adding to 11111100122173 its reverse (37122100111111), we get a palindrome (48233200233284).

The spelling of 11111100122173 in words is "eleven trillion, one hundred eleven billion, one hundred million, one hundred twenty-two thousand, one hundred seventy-three".