321021023312 has 20 divisors (see below), whose sum is σ = 678521708736. Its totient is φ = 145918646880.

The previous prime is 321021023261. The next prime is 321021023317. The reversal of 321021023312 is 213320120123.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321021023317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 911991368 + ... + 911991719.

Almost surely, 2^321021023312 is an apocalyptic number.

It is an amenable number.

321021023312 is an abundant number, since it is smaller than the sum of its proper divisors (357500685424).

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

321021023312 is a wasteful number, since it uses less digits than its factorization.

321021023312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1823983106 (or 1823983100 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 321021023312 its reverse (213320120123), we get a palindrome (534341143435).

The spelling of 321021023312 in words is "three hundred twenty-one billion, twenty-one million, twenty-three thousand, three hundred twelve".