21233223132 has 96 divisors (see below), whose sum is σ = 56466547200. Its totient is φ = 6150816000.

The previous prime is 21233223127. The next prime is 21233223133. The reversal of 21233223132 is 23132233212.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21233223133) 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, 359169 + ... + 414087.

It is an arithmetic number, because the mean of its divisors is an integer number (588193200).

Almost surely, 2^21233223132 is an apocalyptic number.

21233223132 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21233223132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28233273600).

21233223132 is an abundant number, since it is smaller than the sum of its proper divisors (35233324068).

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

21233223132 is a wasteful number, since it uses less digits than its factorization.

21233223132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55067 (or 55065 counting only the distinct ones).

The product of its digits is 2592, while the sum is 24.

Adding to 21233223132 its reverse (23132233212), we get a palindrome (44365456344).

The spelling of 21233223132 in words is "twenty-one billion, two hundred thirty-three million, two hundred twenty-three thousand, one hundred thirty-two".