212123312201 has 2 divisors, whose sum is σ = 212123312202. Its totient is φ = 212123312200.

The previous prime is 212123312173. The next prime is 212123312237. The reversal of 212123312201 is 102213321212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 174418993225 + 37704318976 = 417635^2 + 194176^2 .

It is a cyclic number.

It is not a de Polignac number, because 212123312201 - 2²² = 212119117897 is a prime.

It is not a weakly prime, because it can be changed into another prime (212122312201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106061656100 + 106061656101.

It is an arithmetic number, because the mean of its divisors is an integer number (106061656101).

Almost surely, 2^212123312201 is an apocalyptic number.

It is an amenable number.

212123312201 is a deficient number, since it is larger than the sum of its proper divisors (1).

212123312201 is an equidigital number, since it uses as much as digits as its factorization.

212123312201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 212123312201 its reverse (102213321212), we get a palindrome (314336633413).

The spelling of 212123312201 in words is "two hundred twelve billion, one hundred twenty-three million, three hundred twelve thousand, two hundred one".