212210432309 has 2 divisors, whose sum is σ = 212210432310. Its totient is φ = 212210432308.

The previous prime is 212210432303. The next prime is 212210432321. The reversal of 212210432309 is 903234012212.

It is a happy number.

212210432309 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108705387025 + 103505045284 = 329705^2 + 321722^2 .

It is a cyclic number.

It is not a de Polignac number, because 212210432309 - 2²⁰ = 212209383733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212210432303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106105216154 + 106105216155.

It is an arithmetic number, because the mean of its divisors is an integer number (106105216155).

Almost surely, 2^212210432309 is an apocalyptic number.

It is an amenable number.

212210432309 is a deficient number, since it is larger than the sum of its proper divisors (1).

212210432309 is an equidigital number, since it uses as much as digits as its factorization.

212210432309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 29.

The spelling of 212210432309 in words is "two hundred twelve billion, two hundred ten million, four hundred thirty-two thousand, three hundred nine".