21100112332 has 48 divisors (see below), whose sum is σ = 42018197760. Its totient is φ = 9190767168.

The previous prime is 21100112317. The next prime is 21100112333. The reversal of 21100112332 is 23321100112.

It is not an unprimeable number, because it can be changed into a prime (21100112333) by changing a digit.

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, 219243 + ... + 300445.

It is an arithmetic number, because the mean of its divisors is an integer number (875379120).

Almost surely, 2^21100112332 is an apocalyptic number.

It is an amenable number.

21100112332 is a deficient number, since it is larger than the sum of its proper divisors (20918085428).

21100112332 is a wasteful number, since it uses less digits than its factorization.

21100112332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81502 (or 81500 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21100112332 its reverse (23321100112), we get a palindrome (44421212444).

The spelling of 21100112332 in words is "twenty-one billion, one hundred million, one hundred twelve thousand, three hundred thirty-two".