21213320323301 has 2 divisors, whose sum is σ = 21213320323302. Its totient is φ = 21213320323300.

The previous prime is 21213320323291. The next prime is 21213320323379. The reversal of 21213320323301 is 10332302331212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20779831080100 + 433489243201 = 4558490^2 + 658399^2 .

It is a cyclic number.

It is not a de Polignac number, because 21213320323301 - 2¹⁴ = 21213320306917 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 (21213320323001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10606660161650 + 10606660161651.

It is an arithmetic number, because the mean of its divisors is an integer number (10606660161651).

Almost surely, 2^{21213320323301} is an apocalyptic number.

It is an amenable number.

21213320323301 is a deficient number, since it is larger than the sum of its proper divisors (1).

21213320323301 is an equidigital number, since it uses as much as digits as its factorization.

21213320323301 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 26.

Adding to 21213320323301 its reverse (10332302331212), we get a palindrome (31545622654513).

The spelling of 21213320323301 in words is "twenty-one trillion, two hundred thirteen billion, three hundred twenty million, three hundred twenty-three thousand, three hundred one".