2112212173 has 2 divisors, whose sum is σ = 2112212174. Its totient is φ = 2112212172.

The previous prime is 2112212171. The next prime is 2112212231. The reversal of 2112212173 is 3712122112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1254718084 + 857494089 = 35422^2 + 29283^2 .

It is a cyclic number.

It is not a de Polignac number, because 2112212173 - 2¹ = 2112212171 is a prime.

It is a super-2 number, since 2×2112212173² = 8922880527538763858, which contains 22 as substring.

Together with 2112212171, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2112212171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1056106086 + 1056106087.

It is an arithmetic number, because the mean of its divisors is an integer number (1056106087).

Almost surely, 2^2112212173 is an apocalyptic number.

It is an amenable number.

2112212173 is a deficient number, since it is larger than the sum of its proper divisors (1).

2112212173 is an equidigital number, since it uses as much as digits as its factorization.

2112212173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 336, while the sum is 22.

The square root of 2112212173 is about 45958.8095254871. The cubic root of 2112212173 is about 1283.0566947125.

Adding to 2112212173 its reverse (3712122112), we get a palindrome (5824334285).

The spelling of 2112212173 in words is "two billion, one hundred twelve million, two hundred twelve thousand, one hundred seventy-three".