321220100312 has 16 divisors (see below), whose sum is σ = 602293704000. Its totient is φ = 160608445920.

The previous prime is 321220100303. The next prime is 321220100329. The reversal of 321220100312 is 213001022123.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1438262 + ... + 1646522.

It is an arithmetic number, because the mean of its divisors is an integer number (37643356500).

Almost surely, 2^321220100312 is an apocalyptic number.

It is an amenable number.

321220100312 is a deficient number, since it is larger than the sum of its proper divisors (281073603688).

321220100312 is a wasteful number, since it uses less digits than its factorization.

321220100312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401066 (or 401062 counting only the distinct ones).

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

Adding to 321220100312 its reverse (213001022123), we get a palindrome (534221122435).

The spelling of 321220100312 in words is "three hundred twenty-one billion, two hundred twenty million, one hundred thousand, three hundred twelve".