213321222313 has 4 divisors (see below), whose sum is σ = 213322333140. Its totient is φ = 213320111488.

The previous prime is 213321222311. The next prime is 213321222341. The reversal of 213321222313 is 313222123312.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 123912448144 + 89408774169 = 352012^2 + 299013^2 .

It is a cyclic number.

It is not a de Polignac number, because 213321222313 - 2¹ = 213321222311 is a prime.

It is a super-2 number, since 2×213321222313² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213321222311) 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, 185020 + ... + 678877.

It is an arithmetic number, because the mean of its divisors is an integer number (53330583285).

Almost surely, 2^213321222313 is an apocalyptic number.

It is an amenable number.

213321222313 is a deficient number, since it is larger than the sum of its proper divisors (1110827).

213321222313 is an equidigital number, since it uses as much as digits as its factorization.

213321222313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110826.

The product of its digits is 2592, while the sum is 25.

Adding to 213321222313 its reverse (313222123312), we get a palindrome (526543345625).

Subtracting 213321222313 from its reverse (313222123312), we obtain a palindrome (99900900999).

The spelling of 213321222313 in words is "two hundred thirteen billion, three hundred twenty-one million, two hundred twenty-two thousand, three hundred thirteen".