321103312 has 40 divisors (see below), whose sum is σ = 647994240. Its totient is φ = 153955200.

The previous prime is 321103291. The next prime is 321103313. The reversal of 321103312 is 213301123.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321103313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67773 + ... + 72355.

It is an arithmetic number, because the mean of its divisors is an integer number (16199856).

Almost surely, 2^321103312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 321103312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (323997120).

321103312 is an abundant number, since it is smaller than the sum of its proper divisors (326890928).

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

321103312 is a wasteful number, since it uses less digits than its factorization.

321103312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4771 (or 4765 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 321103312 is about 17919.3557919921. The cubic root of 321103312 is about 684.7755756894.

Adding to 321103312 its reverse (213301123), we get a palindrome (534404435).

The spelling of 321103312 in words is "three hundred twenty-one million, one hundred three thousand, three hundred twelve".