321130213 has 4 divisors (see below), whose sum is σ = 321497260. Its totient is φ = 320763168.

The previous prime is 321130189. The next prime is 321130223. The reversal of 321130213 is 312031123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 312031123 = 269 ⋅1159967.

It can be written as a sum of positive squares in 2 ways, for example, as 305305729 + 15824484 = 17473^2 + 3978^2 .

It is a cyclic number.

It is not a de Polignac number, because 321130213 - 2²⁵ = 287575781 is a prime.

It is a super-2 number, since 2×321130213² = 206249227402850738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321130223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182208 + ... + 183961.

It is an arithmetic number, because the mean of its divisors is an integer number (80374315).

Almost surely, 2^321130213 is an apocalyptic number.

It is an amenable number.

321130213 is a deficient number, since it is larger than the sum of its proper divisors (367047).

321130213 is an equidigital number, since it uses as much as digits as its factorization.

321130213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367046.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 321130213 is about 17920.1063891931. The cubic root of 321130213 is about 684.7946979186.

Adding to 321130213 its reverse (312031123), we get a palindrome (633161336).

The spelling of 321130213 in words is "three hundred twenty-one million, one hundred thirty thousand, two hundred thirteen".