21111303332 has 48 divisors (see below), whose sum is σ = 44502205440. Its totient is φ = 8560445472.

The previous prime is 21111303299. The next prime is 21111303383. The reversal of 21111303332 is 23330311112.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 393473 + ... + 443895.

It is an arithmetic number, because the mean of its divisors is an integer number (927129280).

Almost surely, 2^21111303332 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 21111303332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22251102720).

21111303332 is an abundant number, since it is smaller than the sum of its proper divisors (23390902108).

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

21111303332 is a wasteful number, since it uses less digits than its factorization.

21111303332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51240 (or 51238 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 21111303332 its reverse (23330311112), we get a palindrome (44441614444).

The spelling of 21111303332 in words is "twenty-one billion, one hundred eleven million, three hundred three thousand, three hundred thirty-two".