213200321121 has 12 divisors (see below), whose sum is σ = 307961639700. Its totient is φ = 142130953440.

The previous prime is 213200321107. The next prime is 213200321123. The reversal of 213200321121 is 121123002312.

213200321121 is a `hidden beast` number, since 2 + 1 + 320 + 0 + 321 + 1 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 171363709521 + 41836611600 = 413961^2 + 204540^2 .

It is not a de Polignac number, because 213200321121 - 2¹⁸ = 213200058977 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213200321094 and 213200321103.

It is not an unprimeable number, because it can be changed into a prime (213200321123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 395455 + ... + 763403.

It is an arithmetic number, because the mean of its divisors is an integer number (25663469975).

Almost surely, 2^213200321121 is an apocalyptic number.

It is an amenable number.

213200321121 is a deficient number, since it is larger than the sum of its proper divisors (94761318579).

213200321121 is a wasteful number, since it uses less digits than its factorization.

213200321121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432336 (or 432333 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 213200321121 its reverse (121123002312), we get a palindrome (334323323433).

The spelling of 213200321121 in words is "two hundred thirteen billion, two hundred million, three hundred twenty-one thousand, one hundred twenty-one".