21114443112 has 64 divisors (see below), whose sum is σ = 60341569920. Its totient is φ = 6031239168.

The previous prime is 21114443111. The next prime is 21114443117. The reversal of 21114443112 is 21134441112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (21114443111) 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, 816688 + ... + 842144.

It is an arithmetic number, because the mean of its divisors is an integer number (942837030).

Almost surely, 2^21114443112 is an apocalyptic number.

It is an amenable number.

21114443112 is an abundant number, since it is smaller than the sum of its proper divisors (39227126808).

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

21114443112 is a wasteful number, since it uses less digits than its factorization.

21114443112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30410 (or 30406 counting only the distinct ones).

The product of its digits is 768, while the sum is 24.

Adding to 21114443112 its reverse (21134441112), we get a palindrome (42248884224).

The spelling of 21114443112 in words is "twenty-one billion, one hundred fourteen million, four hundred forty-three thousand, one hundred twelve".