212221021301 has 2 divisors, whose sum is σ = 212221021302. Its totient is φ = 212221021300.

The previous prime is 212221021283. The next prime is 212221021333. The reversal of 212221021301 is 103120122212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 193622880676 + 18598140625 = 440026^2 + 136375^2 .

It is a cyclic number.

It is not a de Polignac number, because 212221021301 - 2¹⁴ = 212221004917 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 212221021301.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212221029301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106110510650 + 106110510651.

It is an arithmetic number, because the mean of its divisors is an integer number (106110510651).

Almost surely, 2^212221021301 is an apocalyptic number.

It is an amenable number.

212221021301 is a deficient number, since it is larger than the sum of its proper divisors (1).

212221021301 is an equidigital number, since it uses as much as digits as its factorization.

212221021301 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 212221021301 its reverse (103120122212), we get a palindrome (315341143513).

The spelling of 212221021301 in words is "two hundred twelve billion, two hundred twenty-one million, twenty-one thousand, three hundred one".