321543143112 has 128 divisors (see below), whose sum is σ = 857532614400. Its totient is φ = 100121591808.

The previous prime is 321543143083. The next prime is 321543143179. The reversal of 321543143112 is 211341345123.

It is a super-2 number, since 2×321543143112² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 321543143112.

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, 34798189 + ... + 34807427.

It is an arithmetic number, because the mean of its divisors is an integer number (6699473550).

Almost surely, 2^321543143112 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 321543143112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (428766307200).

321543143112 is an abundant number, since it is smaller than the sum of its proper divisors (535989471288).

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

321543143112 is a wasteful number, since it uses less digits than its factorization.

321543143112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9895 (or 9891 counting only the distinct ones).

The product of its digits is 8640, while the sum is 30.

Adding to 321543143112 its reverse (211341345123), we get a palindrome (532884488235).

The spelling of 321543143112 in words is "three hundred twenty-one billion, five hundred forty-three million, one hundred forty-three thousand, one hundred twelve".