213200313232121 has 4 divisors (see below), whose sum is σ = 213322771771044. Its totient is φ = 213077854693200.

The previous prime is 213200313232033. The next prime is 213200313232157. The reversal of 213200313232121 is 121232313002312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 75930502143721 + 137269811088400 = 8713811^2 + 11716220^2 .

It is a cyclic number.

It is not a de Polignac number, because 213200313232121 - 2¹⁰ = 213200313231097 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 (213200316232121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61229266850 + ... + 61229270331.

It is an arithmetic number, because the mean of its divisors is an integer number (53330692942761).

Almost surely, 2^{213200313232121} is an apocalyptic number.

It is an amenable number.

213200313232121 is a deficient number, since it is larger than the sum of its proper divisors (122458538923).

213200313232121 is a wasteful number, since it uses less digits than its factorization.

213200313232121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122458538922.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 213200313232121 its reverse (121232313002312), we get a palindrome (334432626234433).

The spelling of 213200313232121 in words is "two hundred thirteen trillion, two hundred billion, three hundred thirteen million, two hundred thirty-two thousand, one hundred twenty-one".