213320330011021 has 4 divisors (see below), whose sum is σ = 213597729660700. Its totient is φ = 213042930361344.

The previous prime is 213320330011003. The next prime is 213320330011031. The reversal of 213320330011021 is 120110033023312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 145355310082921 + 67965019928100 = 12056339^2 + 8244090^2 .

It is a cyclic number.

It is not a de Polignac number, because 213320330011021 - 2⁴⁵ = 178135957922189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213320330010983 and 213320330011001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213320330011001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138699823686 + ... + 138699825223.

It is an arithmetic number, because the mean of its divisors is an integer number (53399432415175).

Almost surely, 2^{213320330011021} is an apocalyptic number.

It is an amenable number.

213320330011021 is a deficient number, since it is larger than the sum of its proper divisors (277399649679).

213320330011021 is an equidigital number, since it uses as much as digits as its factorization.

213320330011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277399649678.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 213320330011021 its reverse (120110033023312), we get a palindrome (333430363034333).

The spelling of 213320330011021 in words is "two hundred thirteen trillion, three hundred twenty billion, three hundred thirty million, eleven thousand, twenty-one".