213313543121 has 16 divisors (see below), whose sum is σ = 245815941888. Its totient is φ = 181322496000.

The previous prime is 213313543097. The next prime is 213313543129. The reversal of 213313543121 is 121345313312.

It is a cyclic number.

It is not a de Polignac number, because 213313543121 - 2¹⁰ = 213313542097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (213313543129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 456641 + ... + 796961.

It is an arithmetic number, because the mean of its divisors is an integer number (15363496368).

Almost surely, 2^213313543121 is an apocalyptic number.

It is an amenable number.

213313543121 is a deficient number, since it is larger than the sum of its proper divisors (32502398767).

213313543121 is a wasteful number, since it uses less digits than its factorization.

213313543121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341072.

The product of its digits is 6480, while the sum is 29.

Adding to 213313543121 its reverse (121345313312), we get a palindrome (334658856433).

The spelling of 213313543121 in words is "two hundred thirteen billion, three hundred thirteen million, five hundred forty-three thousand, one hundred twenty-one".