212303122021 has 2 divisors, whose sum is σ = 212303122022. Its totient is φ = 212303122020.

The previous prime is 212303121923. The next prime is 212303122027. The reversal of 212303122021 is 120221303212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 145705577796 + 66597544225 = 381714^2 + 258065^2 .

It is a cyclic number.

It is not a de Polignac number, because 212303122021 - 2¹³ = 212303113829 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212303122021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212303122027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106151561010 + 106151561011.

It is an arithmetic number, because the mean of its divisors is an integer number (106151561011).

Almost surely, 2^212303122021 is an apocalyptic number.

It is an amenable number.

212303122021 is a deficient number, since it is larger than the sum of its proper divisors (1).

212303122021 is an equidigital number, since it uses as much as digits as its factorization.

212303122021 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 19.

Adding to 212303122021 its reverse (120221303212), we get a palindrome (332524425233).

The spelling of 212303122021 in words is "two hundred twelve billion, three hundred three million, one hundred twenty-two thousand, twenty-one".