321505323412 has 48 divisors (see below), whose sum is σ = 707206510080. Its totient is φ = 124482765312.

The previous prime is 321505323401. The next prime is 321505323611. The reversal of 321505323412 is 214323505123.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9379237 + ... + 9413452.

It is an arithmetic number, because the mean of its divisors is an integer number (14733468960).

Almost surely, 2^321505323412 is an apocalyptic number.

It is an amenable number.

321505323412 is an abundant number, since it is smaller than the sum of its proper divisors (385701186668).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

321505323412 is a wasteful number, since it uses less digits than its factorization.

321505323412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18792760 (or 18792758 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 321505323412 its reverse (214323505123), we get a palindrome (535828828535).

The spelling of 321505323412 in words is "three hundred twenty-one billion, five hundred five million, three hundred twenty-three thousand, four hundred twelve".