21320322232213 has 8 divisors (see below), whose sum is σ = 21336322077720. Its totient is φ = 21304324554240.

The previous prime is 21320322232189. The next prime is 21320322232219. The reversal of 21320322232213 is 31223222302312.

It can be written as a sum of positive squares in 4 ways, for example, as 2918435805649 + 18401886426564 = 1708343^2 + 4289742^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21320322232213 - 2⁹ = 21320322231701 is a prime.

It is a super-2 number, since 2×21320322232213² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21320322232219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19413181 + ... + 20481997.

It is an arithmetic number, because the mean of its divisors is an integer number (2667040259715).

Almost surely, 2^{21320322232213} is an apocalyptic number.

It is an amenable number.

21320322232213 is a deficient number, since it is larger than the sum of its proper divisors (15999845507).

21320322232213 is a wasteful number, since it uses less digits than its factorization.

21320322232213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1083767.

The product of its (nonzero) digits is 10368, while the sum is 28.

Adding to 21320322232213 its reverse (31223222302312), we get a palindrome (52543544534525).

The spelling of 21320322232213 in words is "twenty-one trillion, three hundred twenty billion, three hundred twenty-two million, two hundred thirty-two thousand, two hundred thirteen".