212112151609 has 2 divisors, whose sum is σ = 212112151610. Its totient is φ = 212112151608.

The previous prime is 212112151577. The next prime is 212112151627. The reversal of 212112151609 is 906151211212.

212112151609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 209915167225 + 2196984384 = 458165^2 + 46872^2 .

It is a cyclic number.

It is not a de Polignac number, because 212112151609 - 2⁵ = 212112151577 is a prime.

It is not a weakly prime, because it can be changed into another prime (212112151639) 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, 106056075804 + 106056075805.

It is an arithmetic number, because the mean of its divisors is an integer number (106056075805).

Almost surely, 2^212112151609 is an apocalyptic number.

It is an amenable number.

212112151609 is a deficient number, since it is larger than the sum of its proper divisors (1).

212112151609 is an equidigital number, since it uses as much as digits as its factorization.

212112151609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 31.

The spelling of 212112151609 in words is "two hundred twelve billion, one hundred twelve million, one hundred fifty-one thousand, six hundred nine".