321132221232 has 160 divisors (see below), whose sum is σ = 848020223232. Its totient is φ = 104697987072.

The previous prime is 321132221099. The next prime is 321132221239. The reversal of 321132221232 is 232122231123.

It is a Harshad number since it is a multiple of its sum of digits (24).

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

It is not an unprimeable number, because it can be changed into a prime (321132221239) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 245701123 + ... + 245702429.

Almost surely, 2^321132221232 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 321132221232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (424010111616).

321132221232 is an abundant number, since it is smaller than the sum of its proper divisors (526888002000).

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

321132221232 is a wasteful number, since it uses less digits than its factorization.

321132221232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1995 (or 1989 counting only the distinct ones).

The product of its digits is 1728, while the sum is 24.

Adding to 321132221232 its reverse (232122231123), we get a palindrome (553254452355).

The spelling of 321132221232 in words is "three hundred twenty-one billion, one hundred thirty-two million, two hundred twenty-one thousand, two hundred thirty-two".