212122110173 has 2 divisors, whose sum is σ = 212122110174. Its totient is φ = 212122110172.

The previous prime is 212122110113. The next prime is 212122110217. The reversal of 212122110173 is 371011221212.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 179202362329 + 32919747844 = 423323^2 + 181438^2 .

It is a cyclic number.

It is not a de Polignac number, because 212122110173 - 2²⁰ = 212121061597 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212122110113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106061055086 + 106061055087.

It is an arithmetic number, because the mean of its divisors is an integer number (106061055087).

Almost surely, 2^212122110173 is an apocalyptic number.

It is an amenable number.

212122110173 is a deficient number, since it is larger than the sum of its proper divisors (1).

212122110173 is an equidigital number, since it uses as much as digits as its factorization.

212122110173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 23.

Adding to 212122110173 its reverse (371011221212), we get a palindrome (583133331385).

The spelling of 212122110173 in words is "two hundred twelve billion, one hundred twenty-two million, one hundred ten thousand, one hundred seventy-three".