21201040112 has 120 divisors (see below), whose sum is σ = 48528831456. Its totient is φ = 8945577984.

The previous prime is 21201040109. The next prime is 21201040139. The reversal of 21201040112 is 21104010212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14794148 + ... + 14795580.

Almost surely, 2^21201040112 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 21201040112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24264415728).

21201040112 is an abundant number, since it is smaller than the sum of its proper divisors (27327791344).

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

21201040112 is a wasteful number, since it uses less digits than its factorization.

21201040112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1735 (or 1722 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21201040112 its reverse (21104010212), we get a palindrome (42305050324).

The spelling of 21201040112 in words is "twenty-one billion, two hundred one million, forty thousand, one hundred twelve".