213312311320021 has 8 divisors (see below), whose sum is σ = 218274308350560. Its totient is φ = 208350370907952.

The previous prime is 213312311319997. The next prime is 213312311320039. The reversal of 213312311320021 is 120023113213312.

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 213312311320021 - 2⁴³ = 204516218297813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213312311320621) 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, 6484111 + ... + 21648748.

It is an arithmetic number, because the mean of its divisors is an integer number (27284288543820).

Almost surely, 2^{213312311320021} is an apocalyptic number.

It is an amenable number.

213312311320021 is a deficient number, since it is larger than the sum of its proper divisors (4961997030539).

213312311320021 is a wasteful number, since it uses less digits than its factorization.

213312311320021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28309235.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 213312311320021 its reverse (120023113213312), we get a palindrome (333335424533333).

The spelling of 213312311320021 in words is "two hundred thirteen trillion, three hundred twelve billion, three hundred eleven million, three hundred twenty thousand, twenty-one".