212462011661 has 2 divisors, whose sum is σ = 212462011662. Its totient is φ = 212462011660.

The previous prime is 212462011637. The next prime is 212462011753. The reversal of 212462011661 is 166110264212.

212462011661 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., 110832397225 + 101629614436 = 332915^2 + 318794^2 .

It is a cyclic number.

It is not a de Polignac number, because 212462011661 - 2¹⁰ = 212462010637 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212462011561) 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, 106231005830 + 106231005831.

It is an arithmetic number, because the mean of its divisors is an integer number (106231005831).

Almost surely, 2^212462011661 is an apocalyptic number.

It is an amenable number.

212462011661 is a deficient number, since it is larger than the sum of its proper divisors (1).

212462011661 is an equidigital number, since it uses as much as digits as its factorization.

212462011661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 32.

Adding to 212462011661 its reverse (166110264212), we get a palindrome (378572275873).

The spelling of 212462011661 in words is "two hundred twelve billion, four hundred sixty-two million, eleven thousand, six hundred sixty-one".