212148675209 has 2 divisors, whose sum is σ = 212148675210. Its totient is φ = 212148675208.

The previous prime is 212148675157. The next prime is 212148675227. The reversal of 212148675209 is 902576841212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 171826830400 + 40321844809 = 414520^2 + 200803^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212148675209 is a prime.

It is not a weakly prime, because it can be changed into another prime (212148675239) 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, 106074337604 + 106074337605.

It is an arithmetic number, because the mean of its divisors is an integer number (106074337605).

Almost surely, 2^212148675209 is an apocalyptic number.

It is an amenable number.

212148675209 is a deficient number, since it is larger than the sum of its proper divisors (1).

212148675209 is an equidigital number, since it uses as much as digits as its factorization.

212148675209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 483840, while the sum is 47.

The spelling of 212148675209 in words is "two hundred twelve billion, one hundred forty-eight million, six hundred seventy-five thousand, two hundred nine".