212144420043209 has 2 divisors, whose sum is σ = 212144420043210. Its totient is φ = 212144420043208.

The previous prime is 212144420043161. The next prime is 212144420043239. The reversal of 212144420043209 is 902340024441212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127005506987584 + 85138913055625 = 11269672^2 + 9227075^2 .

It is a cyclic number.

It is not a de Polignac number, because 212144420043209 - 2³² = 212140125075913 is a prime.

It is not a weakly prime, because it can be changed into another prime (212144420043239) 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, 106072210021604 + 106072210021605.

It is an arithmetic number, because the mean of its divisors is an integer number (106072210021605).

Almost surely, 2^{212144420043209} is an apocalyptic number.

It is an amenable number.

212144420043209 is a deficient number, since it is larger than the sum of its proper divisors (1).

212144420043209 is an equidigital number, since it uses as much as digits as its factorization.

212144420043209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 110592, while the sum is 38.

The spelling of 212144420043209 in words is "two hundred twelve trillion, one hundred forty-four billion, four hundred twenty million, forty-three thousand, two hundred nine".