321401213 has 4 divisors (see below), whose sum is σ = 367315680. Its totient is φ = 275486748.

The previous prime is 321401209. The next prime is 321401251. The reversal of 321401213 is 312104123.

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, and also an emirpimes, since its reverse is a distinct semiprime: 312104123 = 191 ⋅1634053.

It is a cyclic number.

It is not a de Polignac number, because 321401213 - 2² = 321401209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 321401191 and 321401200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321401263) 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, 22957223 + ... + 22957236.

It is an arithmetic number, because the mean of its divisors is an integer number (91828920).

Almost surely, 2^321401213 is an apocalyptic number.

It is an amenable number.

321401213 is a deficient number, since it is larger than the sum of its proper divisors (45914467).

321401213 is an equidigital number, since it uses as much as digits as its factorization.

321401213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45914466.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 321401213 is about 17927.6661336606. Note that the first 3 decimals coincide. The cubic root of 321401213 is about 684.9872752356.

Adding to 321401213 its reverse (312104123), we get a palindrome (633505336).

The spelling of 321401213 in words is "three hundred twenty-one million, four hundred one thousand, two hundred thirteen".