21113323332 has 96 divisors (see below), whose sum is σ = 52536097152. Its totient is φ = 6576531456.

The previous prime is 21113323243. The next prime is 21113323339. The reversal of 21113323332 is 23332331112.

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 (21113323339) 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, 22294483 + ... + 22295429.

It is an arithmetic number, because the mean of its divisors is an integer number (547251012).

Almost surely, 2^21113323332 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 21113323332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26268048576).

21113323332 is an abundant number, since it is smaller than the sum of its proper divisors (31422773820).

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

21113323332 is a wasteful number, since it uses less digits than its factorization.

21113323332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1637 (or 1635 counting only the distinct ones).

The product of its digits is 1944, while the sum is 24.

Adding to 21113323332 its reverse (23332331112), we get a palindrome (44445654444).

The spelling of 21113323332 in words is "twenty-one billion, one hundred thirteen million, three hundred twenty-three thousand, three hundred thirty-two".