111995019173 has 2 divisors, whose sum is σ = 111995019174. Its totient is φ = 111995019172.

The previous prime is 111995019127. The next prime is 111995019259. The reversal of 111995019173 is 371910599111.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111648203044 + 346816129 = 334138^2 + 18623^2 .

It is an emirp because it is prime and its reverse (371910599111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111995019173 - 2³⁰ = 110921277349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111995619173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55997509586 + 55997509587.

It is an arithmetic number, because the mean of its divisors is an integer number (55997509587).

Almost surely, 2^111995019173 is an apocalyptic number.

It is an amenable number.

111995019173 is a deficient number, since it is larger than the sum of its proper divisors (1).

111995019173 is an equidigital number, since it uses as much as digits as its factorization.

111995019173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 76545, while the sum is 47.

The spelling of 111995019173 in words is "one hundred eleven billion, nine hundred ninety-five million, nineteen thousand, one hundred seventy-three".