213344021021 has 2 divisors, whose sum is σ = 213344021022. Its totient is φ = 213344021020.

The previous prime is 213344020999. The next prime is 213344021039. The reversal of 213344021021 is 120120443312.

213344021021 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., 118827741796 + 94516279225 = 344714^2 + 307435^2 .

It is a cyclic number.

It is not a de Polignac number, because 213344021021 - 2¹⁰ = 213344019997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213344021041) 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, 106672010510 + 106672010511.

It is an arithmetic number, because the mean of its divisors is an integer number (106672010511).

Almost surely, 2^213344021021 is an apocalyptic number.

It is an amenable number.

213344021021 is a deficient number, since it is larger than the sum of its proper divisors (1).

213344021021 is an equidigital number, since it uses as much as digits as its factorization.

213344021021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 213344021021 its reverse (120120443312), we get a palindrome (333464464333).

The spelling of 213344021021 in words is "two hundred thirteen billion, three hundred forty-four million, twenty-one thousand, twenty-one".