21044302112 has 96 divisors (see below), whose sum is σ = 44591238720. Its totient is φ = 9745781760.

The previous prime is 21044302063. The next prime is 21044302117. The reversal of 21044302112 is 21120344012.

It is a super-2 number, since 2×21044302112² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21044302117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10665158 + ... + 10667130.

It is an arithmetic number, because the mean of its divisors is an integer number (464492070).

Almost surely, 2^21044302112 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 21044302112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22295619360).

21044302112 is an abundant number, since it is smaller than the sum of its proper divisors (23546936608).

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

21044302112 is a wasteful number, since it uses less digits than its factorization.

21044302112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2386 (or 2378 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21044302112 its reverse (21120344012), we get a palindrome (42164646124).

The spelling of 21044302112 in words is "twenty-one billion, forty-four million, three hundred two thousand, one hundred twelve".