213302433331021 has 2 divisors, whose sum is σ = 213302433331022. Its totient is φ = 213302433331020.

The previous prime is 213302433330989. The next prime is 213302433331081. The reversal of 213302433331021 is 120133334203312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117867392055625 + 95435041275396 = 10856675^2 + 9769086^2 .

It is a cyclic number.

It is not a de Polignac number, because 213302433331021 - 2⁵ = 213302433330989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213302433331081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106651216665510 + 106651216665511.

It is an arithmetic number, because the mean of its divisors is an integer number (106651216665511).

Almost surely, 2^{213302433331021} is an apocalyptic number.

It is an amenable number.

213302433331021 is a deficient number, since it is larger than the sum of its proper divisors (1).

213302433331021 is an equidigital number, since it uses as much as digits as its factorization.

213302433331021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 31.

Adding to 213302433331021 its reverse (120133334203312), we get a palindrome (333435767534333).

The spelling of 213302433331021 in words is "two hundred thirteen trillion, three hundred two billion, four hundred thirty-three million, three hundred thirty-one thousand, twenty-one".