321211112124 has 96 divisors (see below), whose sum is σ = 863050406400. Its totient is φ = 91080582912.

The previous prime is 321211112119. The next prime is 321211112143. The reversal of 321211112124 is 421211112123.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 321211112124.

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, 15471919 + ... + 15492665.

It is an arithmetic number, because the mean of its divisors is an integer number (8990108400).

Almost surely, 2^321211112124 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 321211112124, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (431525203200).

321211112124 is an abundant number, since it is smaller than the sum of its proper divisors (541839294276).

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

321211112124 is a wasteful number, since it uses less digits than its factorization.

321211112124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22147 (or 22145 counting only the distinct ones).

The product of its digits is 192, while the sum is 21.

Adding to 321211112124 its reverse (421211112123), we get a palindrome (742422224247).

Subtracting 321211112124 from its reverse (421211112123), we obtain a palindrome (99999999999).

The spelling of 321211112124 in words is "three hundred twenty-one billion, two hundred eleven million, one hundred twelve thousand, one hundred twenty-four".