21201010112 has 56 divisors (see below), whose sum is σ = 43460822400. Its totient is φ = 10250772480.

The previous prime is 21201010093. The next prime is 21201010183. The reversal of 21201010112 is 21101010212.

It is a junction number, because it is equal to n+sod(n) for n = 21201010093 and 21201010102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3284264 + ... + 3290712.

Almost surely, 2^21201010112 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 21201010112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21730411200).

21201010112 is an abundant number, since it is smaller than the sum of its proper divisors (22259812288).

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

21201010112 is a wasteful number, since it uses less digits than its factorization.

21201010112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8149 (or 8139 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21201010112 its reverse (21101010212), we get a palindrome (42302020324).

The spelling of 21201010112 in words is "twenty-one billion, two hundred one million, ten thousand, one hundred twelve".