321122412 has 72 divisors (see below), whose sum is σ = 912204384. Its totient is φ = 94507776.

The previous prime is 321122369. The next prime is 321122429. The reversal of 321122412 is 214221123.

It is a happy number.

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

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4153 + ... + 25680.

Almost surely, 2^321122412 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 321122412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (456102192).

321122412 is an abundant number, since it is smaller than the sum of its proper divisors (591081972).

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

321122412 is a wasteful number, since it uses less digits than its factorization.

321122412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29879 (or 29874 counting only the distinct ones).

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

The square root of 321122412 is about 17919.8887273331. Note that the first 3 decimals coincide. The cubic root of 321122412 is about 684.7891527882.

Adding to 321122412 its reverse (214221123), we get a palindrome (535343535).

The spelling of 321122412 in words is "three hundred twenty-one million, one hundred twenty-two thousand, four hundred twelve".