212420301221 has 2 divisors, whose sum is σ = 212420301222. Its totient is φ = 212420301220.

The previous prime is 212420301179. The next prime is 212420301239. The reversal of 212420301221 is 122103024212.

212420301221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 169110112900 + 43310188321 = 411230^2 + 208111^2 .

It is a cyclic number.

It is not a de Polignac number, because 212420301221 - 2²⁶ = 212353192357 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212420301193 and 212420301202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212420301421) 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, 106210150610 + 106210150611.

It is an arithmetic number, because the mean of its divisors is an integer number (106210150611).

Almost surely, 2^212420301221 is an apocalyptic number.

It is an amenable number.

212420301221 is a deficient number, since it is larger than the sum of its proper divisors (1).

212420301221 is an equidigital number, since it uses as much as digits as its factorization.

212420301221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 212420301221 its reverse (122103024212), we get a palindrome (334523325433).

The spelling of 212420301221 in words is "two hundred twelve billion, four hundred twenty million, three hundred one thousand, two hundred twenty-one".