12012012212173 has 2 divisors, whose sum is σ = 12012012212174. Its totient is φ = 12012012212172.

The previous prime is 12012012212171. The next prime is 12012012212219. The reversal of 12012012212173 is 37121221021021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8807350127524 + 3204662084649 = 2967718^2 + 1790157^2 .

It is a cyclic number.

It is not a de Polignac number, because 12012012212173 - 2¹ = 12012012212171 is a prime.

Together with 12012012212171, 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 (12012012212171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6006006106086 + 6006006106087.

It is an arithmetic number, because the mean of its divisors is an integer number (6006006106087).

Almost surely, 2^{12012012212173} is an apocalyptic number.

It is an amenable number.

12012012212173 is a deficient number, since it is larger than the sum of its proper divisors (1).

12012012212173 is an equidigital number, since it uses as much as digits as its factorization.

12012012212173 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 12012012212173 its reverse (37121221021021), we get a palindrome (49133233233194).

The spelling of 12012012212173 in words is "twelve trillion, twelve billion, twelve million, two hundred twelve thousand, one hundred seventy-three".