1912111100173 has 2 divisors, whose sum is σ = 1912111100174. Its totient is φ = 1912111100172.

The previous prime is 1912111100153. The next prime is 1912111100209. The reversal of 1912111100173 is 3710011112191.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1909210954564 + 2900145609 = 1381742^2 + 53853^2 .

It is a cyclic number.

It is not a de Polignac number, because 1912111100173 - 2²⁹ = 1911574229261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1912111100153) 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, 956055550086 + 956055550087.

It is an arithmetic number, because the mean of its divisors is an integer number (956055550087).

Almost surely, 2^{1912111100173} is an apocalyptic number.

It is an amenable number.

1912111100173 is a deficient number, since it is larger than the sum of its proper divisors (1).

1912111100173 is an equidigital number, since it uses as much as digits as its factorization.

1912111100173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 378, while the sum is 28.

The spelling of 1912111100173 in words is "one trillion, nine hundred twelve billion, one hundred eleven million, one hundred thousand, one hundred seventy-three".