321533053312 has 64 divisors (see below), whose sum is σ = 651870147600. Its totient is φ = 157930276864.

The previous prime is 321533053273. The next prime is 321533053427. The reversal of 321533053312 is 213350335123.

It is a tau number, because it is divible by the number of its divisors (64).

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 7 ways as a sum of consecutive naturals, for example, 11260878 + ... + 11289394.

Almost surely, 2^321533053312 is an apocalyptic number.

321533053312 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 321533053312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (325935073800).

321533053312 is an abundant number, since it is smaller than the sum of its proper divisors (330337094288).

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

321533053312 is a wasteful number, since it uses less digits than its factorization.

321533053312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30083 (or 30071 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 31.

Adding to 321533053312 its reverse (213350335123), we get a palindrome (534883388435).

The spelling of 321533053312 in words is "three hundred twenty-one billion, five hundred thirty-three million, fifty-three thousand, three hundred twelve".