321131213206 has 8 divisors (see below), whose sum is σ = 481701986640. Its totient is φ = 160563884328.

The previous prime is 321131213177. The next prime is 321131213209. The reversal of 321131213206 is 602312131123.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321131213209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 613866 + ... + 1009501.

It is an arithmetic number, because the mean of its divisors is an integer number (60212748330).

Almost surely, 2^321131213206 is an apocalyptic number.

321131213206 is a deficient number, since it is larger than the sum of its proper divisors (160570773434).

321131213206 is a wasteful number, since it uses less digits than its factorization.

321131213206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1722278.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 321131213206 its reverse (602312131123), we get a palindrome (923443344329).

The spelling of 321131213206 in words is "three hundred twenty-one billion, one hundred thirty-one million, two hundred thirteen thousand, two hundred six".