213130232321 has 4 divisors (see below), whose sum is σ = 216742609200. Its totient is φ = 209517855444.

The previous prime is 213130232299. The next prime is 213130232339. The reversal of 213130232321 is 123232031312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 213130232321 - 2⁶ = 213130232257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213130432321) 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, 1806188351 + ... + 1806188468.

It is an arithmetic number, because the mean of its divisors is an integer number (54185652300).

Almost surely, 2^213130232321 is an apocalyptic number.

It is an amenable number.

213130232321 is a deficient number, since it is larger than the sum of its proper divisors (3612376879).

213130232321 is an equidigital number, since it uses as much as digits as its factorization.

213130232321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3612376878.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 213130232321 its reverse (123232031312), we get a palindrome (336362263633).

The spelling of 213130232321 in words is "two hundred thirteen billion, one hundred thirty million, two hundred thirty-two thousand, three hundred twenty-one".