2112195817 has 2 divisors, whose sum is σ = 2112195818. Its totient is φ = 2112195816.

The previous prime is 2112195809. The next prime is 2112195829. The reversal of 2112195817 is 7185912112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1764336016 + 347859801 = 42004^2 + 18651^2 .

It is a cyclic number.

It is not a de Polignac number, because 2112195817 - 2³ = 2112195809 is a prime.

It is a super-2 number, since 2×2112195817² = 8922742338704594978, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2112195517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1056097908 + 1056097909.

It is an arithmetic number, because the mean of its divisors is an integer number (1056097909).

Almost surely, 2^2112195817 is an apocalyptic number.

It is an amenable number.

2112195817 is a deficient number, since it is larger than the sum of its proper divisors (1).

2112195817 is an equidigital number, since it uses as much as digits as its factorization.

2112195817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10080, while the sum is 37.

The square root of 2112195817 is about 45958.6315831966. The cubic root of 2112195817 is about 1283.0533829036.

The spelling of 2112195817 in words is "two billion, one hundred twelve million, one hundred ninety-five thousand, eight hundred seventeen".