2112111173 has 2 divisors, whose sum is σ = 2112111174. Its totient is φ = 2112111172.

The previous prime is 2112111139. The next prime is 2112111181. The reversal of 2112111173 is 3711112112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2111678209 + 432964 = 45953^2 + 658^2 .

It is a cyclic number.

It is not a de Polignac number, because 2112111173 - 2²² = 2107916869 is a prime.

It is a super-2 number, since 2×2112111173² = 8922027214222871858, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2112111103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1056055586 + 1056055587.

It is an arithmetic number, because the mean of its divisors is an integer number (1056055587).

Almost surely, 2^2112111173 is an apocalyptic number.

It is an amenable number.

2112111173 is a deficient number, since it is larger than the sum of its proper divisors (1).

2112111173 is an equidigital number, since it uses as much as digits as its factorization.

2112111173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84, while the sum is 20.

The square root of 2112111173 is about 45957.7107023403. The cubic root of 2112111173 is about 1283.0362436749.

Adding to 2112111173 its reverse (3711112112), we get a palindrome (5823223285).

The spelling of 2112111173 in words is "two billion, one hundred twelve million, one hundred eleven thousand, one hundred seventy-three".