21011112132 has 48 divisors (see below), whose sum is σ = 50729535360. Its totient is φ = 6760456192.

The previous prime is 21011112131. The next prime is 21011112169. The reversal of 21011112132 is 23121111012.

It is not an unprimeable number, because it can be changed into a prime (21011112131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2643268 + ... + 2651204.

It is an arithmetic number, because the mean of its divisors is an integer number (1056865320).

Almost surely, 2^21011112132 is an apocalyptic number.

It is an amenable number.

21011112132 is an abundant number, since it is smaller than the sum of its proper divisors (29718423228).

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

21011112132 is a wasteful number, since it uses less digits than its factorization.

21011112132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15580 (or 15578 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 21011112132 its reverse (23121111012), we get a palindrome (44132223144).

The spelling of 21011112132 in words is "twenty-one billion, eleven million, one hundred twelve thousand, one hundred thirty-two".