21003066112 has 72 divisors (see below), whose sum is σ = 47941709312. Its totient is φ = 8995968000.

The previous prime is 21003065989. The next prime is 21003066113. The reversal of 21003066112 is 21166030012.

It is a super-2 number, since 2×21003066112² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21003066113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5106937 + ... + 5111047.

Almost surely, 2^21003066112 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 21003066112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23970854656).

21003066112 is an abundant number, since it is smaller than the sum of its proper divisors (26938643200).

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

21003066112 is an equidigital number, since it uses as much as digits as its factorization.

21003066112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6985 (or 6971 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 21003066112 its reverse (21166030012), we get a palindrome (42169096124).

The spelling of 21003066112 in words is "twenty-one billion, three million, sixty-six thousand, one hundred twelve".