111431100173 has 2 divisors, whose sum is σ = 111431100174. Its totient is φ = 111431100172.

The previous prime is 111431100163. The next prime is 111431100181. The reversal of 111431100173 is 371001134111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72212050729 + 39219049444 = 268723^2 + 198038^2 .

It is a cyclic number.

It is not a de Polignac number, because 111431100173 - 2³² = 107136132877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111431100113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55715550086 + 55715550087.

It is an arithmetic number, because the mean of its divisors is an integer number (55715550087).

Almost surely, 2^111431100173 is an apocalyptic number.

It is an amenable number.

111431100173 is a deficient number, since it is larger than the sum of its proper divisors (1).

111431100173 is an equidigital number, since it uses as much as digits as its factorization.

111431100173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 23.

Adding to 111431100173 its reverse (371001134111), we get a palindrome (482432234284).

The spelling of 111431100173 in words is "one hundred eleven billion, four hundred thirty-one million, one hundred thousand, one hundred seventy-three".