1230111173 has 2 divisors, whose sum is σ = 1230111174. Its totient is φ = 1230111172.

The previous prime is 1230111163. The next prime is 1230111187. The reversal of 1230111173 is 3711110321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1031244769 + 198866404 = 32113^2 + 14102^2 .

It is a cyclic number.

It is not a de Polignac number, because 1230111173 - 2¹⁰ = 1230110149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1230111163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615055586 + 615055587.

It is an arithmetic number, because the mean of its divisors is an integer number (615055587).

Almost surely, 2^1230111173 is an apocalyptic number.

It is an amenable number.

1230111173 is a deficient number, since it is larger than the sum of its proper divisors (1).

1230111173 is an equidigital number, since it uses as much as digits as its factorization.

1230111173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 126, while the sum is 20.

The square root of 1230111173 is about 35072.9407520955. The cubic root of 1230111173 is about 1071.4735492983.

Adding to 1230111173 its reverse (3711110321), we get a palindrome (4941221494).

The spelling of 1230111173 in words is "one billion, two hundred thirty million, one hundred eleven thousand, one hundred seventy-three".