321205353213 has 8 divisors (see below), whose sum is σ = 433694992000. Its totient is φ = 211426308288.

The previous prime is 321205353199. The next prime is 321205353277. The reversal of 321205353213 is 312353502123.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 321205353213 - 2¹⁸ = 321205091069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321205358213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 677648188 + ... + 677648661.

It is an arithmetic number, because the mean of its divisors is an integer number (54211874000).

Almost surely, 2^321205353213 is an apocalyptic number.

It is an amenable number.

321205353213 is a deficient number, since it is larger than the sum of its proper divisors (112489638787).

321205353213 is a wasteful number, since it uses less digits than its factorization.

321205353213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1355296931.

The product of its (nonzero) digits is 16200, while the sum is 30.

Adding to 321205353213 its reverse (312353502123), we get a palindrome (633558855336).

The spelling of 321205353213 in words is "three hundred twenty-one billion, two hundred five million, three hundred fifty-three thousand, two hundred thirteen".