321040021344 has 192 divisors, whose sum is σ = 1006490935296. Its totient is φ = 87685968384.

The previous prime is 321040021271. The next prime is 321040021349. The reversal of 321040021344 is 443120040123.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321040021349) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1239919 + ... + 1476305.

It is an arithmetic number, because the mean of its divisors is an integer number (5242140288).

Almost surely, 2^321040021344 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 321040021344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (503245467648).

321040021344 is an abundant number, since it is smaller than the sum of its proper divisors (685450913952).

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

321040021344 is a wasteful number, since it uses less digits than its factorization.

321040021344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236497 (or 236489 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 321040021344 its reverse (443120040123), we get a palindrome (764160061467).

The spelling of 321040021344 in words is "three hundred twenty-one billion, forty million, twenty-one thousand, three hundred forty-four".