212243057969 has 2 divisors, whose sum is σ = 212243057970. Its totient is φ = 212243057968.

The previous prime is 212243057951. The next prime is 212243057977. The reversal of 212243057969 is 969750342212.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 169842894400 + 42400163569 = 412120^2 + 205913^2 .

It is a cyclic number.

It is not a de Polignac number, because 212243057969 - 2¹² = 212243053873 is a prime.

It is a super-2 number, since 2×212243057969² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (212243057269) 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, 106121528984 + 106121528985.

It is an arithmetic number, because the mean of its divisors is an integer number (106121528985).

Almost surely, 2^212243057969 is an apocalyptic number.

It is an amenable number.

212243057969 is a deficient number, since it is larger than the sum of its proper divisors (1).

212243057969 is an equidigital number, since it uses as much as digits as its factorization.

212243057969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1632960, while the sum is 50.

The spelling of 212243057969 in words is "two hundred twelve billion, two hundred forty-three million, fifty-seven thousand, nine hundred sixty-nine".