212344211689 has 2 divisors, whose sum is σ = 212344211690. Its totient is φ = 212344211688.

The previous prime is 212344211669. The next prime is 212344211777. The reversal of 212344211689 is 986112443212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 212075907289 + 268304400 = 460517^2 + 16380^2 .

It is a cyclic number.

It is not a de Polignac number, because 212344211689 - 2⁵ = 212344211657 is a prime.

It is not a weakly prime, because it can be changed into another prime (212344211659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106172105844 + 106172105845.

It is an arithmetic number, because the mean of its divisors is an integer number (106172105845).

Almost surely, 2^212344211689 is an apocalyptic number.

It is an amenable number.

212344211689 is a deficient number, since it is larger than the sum of its proper divisors (1).

212344211689 is an equidigital number, since it uses as much as digits as its factorization.

212344211689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 165888, while the sum is 43.

The spelling of 212344211689 in words is "two hundred twelve billion, three hundred forty-four million, two hundred eleven thousand, six hundred eighty-nine".