212012102120173 has 2 divisors, whose sum is σ = 212012102120174. Its totient is φ = 212012102120172.

The previous prime is 212012102120113. The next prime is 212012102120239. The reversal of 212012102120173 is 371021201210212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 176642759652804 + 35369342467369 = 13290702^2 + 5947213^2 .

It is a cyclic number.

It is not a de Polignac number, because 212012102120173 - 2²⁹ = 212011565249261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212012102120113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106006051060086 + 106006051060087.

It is an arithmetic number, because the mean of its divisors is an integer number (106006051060087).

Almost surely, 2^{212012102120173} is an apocalyptic number.

It is an amenable number.

212012102120173 is a deficient number, since it is larger than the sum of its proper divisors (1).

212012102120173 is an equidigital number, since it uses as much as digits as its factorization.

212012102120173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 25.

Adding to 212012102120173 its reverse (371021201210212), we get a palindrome (583033303330385).

The spelling of 212012102120173 in words is "two hundred twelve trillion, twelve billion, one hundred two million, one hundred twenty thousand, one hundred seventy-three".