1212310113173 has 2 divisors, whose sum is σ = 1212310113174. Its totient is φ = 1212310113172.

The previous prime is 1212310113083. The next prime is 1212310113229. The reversal of 1212310113173 is 3713110132121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1085415999889 + 126894113284 = 1041833^2 + 356222^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212310113173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212310913173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606155056586 + 606155056587.

It is an arithmetic number, because the mean of its divisors is an integer number (606155056587).

Almost surely, 2^{1212310113173} is an apocalyptic number.

It is an amenable number.

1212310113173 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212310113173 is an equidigital number, since it uses as much as digits as its factorization.

1212310113173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 26.

Adding to 1212310113173 its reverse (3713110132121), we get a palindrome (4925420245294).

The spelling of 1212310113173 in words is "one trillion, two hundred twelve billion, three hundred ten million, one hundred thirteen thousand, one hundred seventy-three".