213310311221 has 8 divisors (see below), whose sum is σ = 243790219200. Its totient is φ = 182832154848.

The previous prime is 213310311199. The next prime is 213310311241. The reversal of 213310311221 is 122113013312.

It is a happy number.

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

It is not a de Polignac number, because 213310311221 - 2²⁶ = 213243202357 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213310311193 and 213310311202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213310311241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165656 + ... + 673841.

It is an arithmetic number, because the mean of its divisors is an integer number (30473777400).

Almost surely, 2^213310311221 is an apocalyptic number.

It is an amenable number.

213310311221 is a deficient number, since it is larger than the sum of its proper divisors (30479907979).

213310311221 is an equidigital number, since it uses as much as digits as its factorization.

213310311221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 875803.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 213310311221 its reverse (122113013312), we get a palindrome (335423324533).

The spelling of 213310311221 in words is "two hundred thirteen billion, three hundred ten million, three hundred eleven thousand, two hundred twenty-one".