321243021112 has 128 divisors (see below), whose sum is σ = 674971315200. Its totient is φ = 142381555200.

The previous prime is 321243021091. The next prime is 321243021137. The reversal of 321243021112 is 211120342123.

It is a super-2 number, since 2×321243021112² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 294447687 + ... + 294448777.

It is an arithmetic number, because the mean of its divisors is an integer number (5273213400).

Almost surely, 2^321243021112 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 321243021112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (337485657600).

321243021112 is an abundant number, since it is smaller than the sum of its proper divisors (353728294088).

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

321243021112 is a wasteful number, since it uses less digits than its factorization.

321243021112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2237 (or 2233 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 321243021112 its reverse (211120342123), we get a palindrome (532363363235).

The spelling of 321243021112 in words is "three hundred twenty-one billion, two hundred forty-three million, twenty-one thousand, one hundred twelve".