212023323122021 has 2 divisors, whose sum is σ = 212023323122022. Its totient is φ = 212023323122020.

The previous prime is 212023323122011. The next prime is 212023323122041. The reversal of 212023323122021 is 120221323320212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 196574728701121 + 15448594420900 = 14020511^2 + 3930470^2 .

It is a cyclic number.

It is not a de Polignac number, because 212023323122021 - 2³⁴ = 212006143252837 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212023323122011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106011661561010 + 106011661561011.

It is an arithmetic number, because the mean of its divisors is an integer number (106011661561011).

Almost surely, 2^{212023323122021} is an apocalyptic number.

It is an amenable number.

212023323122021 is a deficient number, since it is larger than the sum of its proper divisors (1).

212023323122021 is an equidigital number, since it uses as much as digits as its factorization.

212023323122021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 212023323122021 its reverse (120221323320212), we get a palindrome (332244646442233).

The spelling of 212023323122021 in words is "two hundred twelve trillion, twenty-three billion, three hundred twenty-three million, one hundred twenty-two thousand, twenty-one".