213321311 has 8 divisors (see below), whose sum is σ = 244452384. Its totient is φ = 182354400.

The previous prime is 213321307. The next prime is 213321313. The reversal of 213321311 is 113123312.

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 213321311 - 2² = 213321307 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 213321311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213321313) 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, 38240 + ... + 43461.

It is an arithmetic number, because the mean of its divisors is an integer number (30556548).

Almost surely, 2^213321311 is an apocalyptic number.

213321311 is a deficient number, since it is larger than the sum of its proper divisors (31131073).

213321311 is an equidigital number, since it uses as much as digits as its factorization.

213321311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82081.

The product of its digits is 108, while the sum is 17.

The square root of 213321311 is about 14605.5233045585. The cubic root of 213321311 is about 597.5094083006.

Adding to 213321311 its reverse (113123312), we get a palindrome (326444623).

The spelling of 213321311 in words is "two hundred thirteen million, three hundred twenty-one thousand, three hundred eleven".