212121208027 has 2 divisors, whose sum is σ = 212121208028. Its totient is φ = 212121208026.

The previous prime is 212121208021. The next prime is 212121208043. The reversal of 212121208027 is 720802121212.

212121208027 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 is a cyclic number.

It is not a de Polignac number, because 212121208027 - 2³⁵ = 177761469659 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212121207986 and 212121208004.

It is not a weakly prime, because it can be changed into another prime (212121208021) 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, 106060604013 + 106060604014.

It is an arithmetic number, because the mean of its divisors is an integer number (106060604014).

Almost surely, 2^212121208027 is an apocalyptic number.

212121208027 is a deficient number, since it is larger than the sum of its proper divisors (1).

212121208027 is an equidigital number, since it uses as much as digits as its factorization.

212121208027 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1792, while the sum is 28.

Adding to 212121208027 its reverse (720802121212), we get a palindrome (932923329239).

The spelling of 212121208027 in words is "two hundred twelve billion, one hundred twenty-one million, two hundred eight thousand, twenty-seven".