213230123121 has 24 divisors (see below), whose sum is σ = 300163687200. Its totient is φ = 134624179584.

The previous prime is 213230123111. The next prime is 213230123149. The reversal of 213230123121 is 121321032312.

It is not a de Polignac number, because 213230123121 - 2¹⁰ = 213230122097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213230123111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3175705 + ... + 3242153.

It is an arithmetic number, because the mean of its divisors is an integer number (12506820300).

Almost surely, 2^213230123121 is an apocalyptic number.

It is an amenable number.

213230123121 is a deficient number, since it is larger than the sum of its proper divisors (86933564079).

213230123121 is a wasteful number, since it uses less digits than its factorization.

213230123121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69453 (or 69434 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 213230123121 its reverse (121321032312), we get a palindrome (334551155433).

The spelling of 213230123121 in words is "two hundred thirteen billion, two hundred thirty million, one hundred twenty-three thousand, one hundred twenty-one".