111211100000173 has 2 divisors, whose sum is σ = 111211100000174. Its totient is φ = 111211100000172.

The previous prime is 111211100000171. The next prime is 111211100000219. The reversal of 111211100000173 is 371000001112111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63194820533289 + 48016279466884 = 7949517^2 + 6929378^2 .

It is a cyclic number.

It is not a de Polignac number, because 111211100000173 - 2¹ = 111211100000171 is a prime.

Together with 111211100000171, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 111211100000173.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111211100000171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55605550000086 + 55605550000087.

It is an arithmetic number, because the mean of its divisors is an integer number (55605550000087).

Almost surely, 2^{111211100000173} is an apocalyptic number.

It is an amenable number.

111211100000173 is a deficient number, since it is larger than the sum of its proper divisors (1).

111211100000173 is an equidigital number, since it uses as much as digits as its factorization.

111211100000173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42, while the sum is 19.

Adding to 111211100000173 its reverse (371000001112111), we get a palindrome (482211101112284).

The spelling of 111211100000173 in words is "one hundred eleven trillion, two hundred eleven billion, one hundred million, one hundred seventy-three", and thus it is an aban number.