321122200212 has 144 divisors (see below), whose sum is σ = 914638792704. Its totient is φ = 94113576000.

The previous prime is 321122200207. The next prime is 321122200219. The reversal of 321122200212 is 212002221123.

321122200212 is a `hidden beast` number, since 321 + 122 + 200 + 21 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321122200219) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 22912287 + ... + 22926297.

Almost surely, 2^321122200212 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 321122200212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (457319396352).

321122200212 is an abundant number, since it is smaller than the sum of its proper divisors (593516592492).

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

321122200212 is a wasteful number, since it uses less digits than its factorization.

321122200212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15930 (or 15925 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 321122200212 its reverse (212002221123), we get a palindrome (533124421335).

The spelling of 321122200212 in words is "three hundred twenty-one billion, one hundred twenty-two million, two hundred thousand, two hundred twelve".