111021110173 has 2 divisors, whose sum is σ = 111021110174. Its totient is φ = 111021110172.

The previous prime is 111021110159. The next prime is 111021110201. The reversal of 111021110173 is 371011120111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102488339044 + 8532771129 = 320138^2 + 92373^2 .

It is a cyclic number.

It is not a de Polignac number, because 111021110173 - 2⁵ = 111021110141 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111021110173.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111021110143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55510555086 + 55510555087.

It is an arithmetic number, because the mean of its divisors is an integer number (55510555087).

Almost surely, 2^111021110173 is an apocalyptic number.

It is an amenable number.

111021110173 is a deficient number, since it is larger than the sum of its proper divisors (1).

111021110173 is an equidigital number, since it uses as much as digits as its factorization.

111021110173 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 111021110173 its reverse (371011120111), we get a palindrome (482032230284).

The spelling of 111021110173 in words is "one hundred eleven billion, twenty-one million, one hundred ten thousand, one hundred seventy-three".