21111240332 has 48 divisors (see below), whose sum is σ = 45538059840. Its totient is φ = 8339265792.

The previous prime is 21111240307. The next prime is 21111240349. The reversal of 21111240332 is 23304211112.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 203594 + ... + 289262.

It is an arithmetic number, because the mean of its divisors is an integer number (948709580).

Almost surely, 2^21111240332 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 21111240332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22769029920).

21111240332 is an abundant number, since it is smaller than the sum of its proper divisors (24426819508).

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

21111240332 is a wasteful number, since it uses less digits than its factorization.

21111240332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86370 (or 86368 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21111240332 its reverse (23304211112), we get a palindrome (44415451444).

The spelling of 21111240332 in words is "twenty-one billion, one hundred eleven million, two hundred forty thousand, three hundred thirty-two".