213323323221 has 8 divisors (see below), whose sum is σ = 316034552960. Its totient is φ = 142215548796.

The previous prime is 213323323219. The next prime is 213323323247. The reversal of 213323323221 is 122323323312.

213323323221 is a `hidden beast` number, since 2 + 1 + 3 + 3 + 2 + 332 + 322 + 1 = 666.

It is not a de Polignac number, because 213323323221 - 2¹ = 213323323219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 7900863823 = 213323323221 / (2 + 1 + 3 + 3 + 2 + 3 + 3 + 2 + 3 + 2 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213323323201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3950431885 + ... + 3950431938.

It is an arithmetic number, because the mean of its divisors is an integer number (39504319120).

Almost surely, 2^213323323221 is an apocalyptic number.

It is an amenable number.

213323323221 is a deficient number, since it is larger than the sum of its proper divisors (102711229739).

213323323221 is an equidigital number, since it uses as much as digits as its factorization.

213323323221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7900863832 (or 7900863826 counting only the distinct ones).

The product of its digits is 7776, while the sum is 27.

Adding to 213323323221 its reverse (122323323312), we get a palindrome (335646646533).

Subtracting from 213323323221 its reverse (122323323312), we obtain a palindrome (90999999909).

The spelling of 213323323221 in words is "two hundred thirteen billion, three hundred twenty-three million, three hundred twenty-three thousand, two hundred twenty-one".