21113144112 has 40 divisors (see below), whose sum is σ = 54759620160. Its totient is φ = 7009672000.

The previous prime is 21113144111. The next prime is 21113144119. The reversal of 21113144112 is 21144131112.

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 (21113144111) 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, 864162 + ... + 888257.

It is an arithmetic number, because the mean of its divisors is an integer number (1368990504).

Almost surely, 2^21113144112 is an apocalyptic number.

It is an amenable number.

21113144112 is an abundant number, since it is smaller than the sum of its proper divisors (33646476048).

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

21113144112 is a wasteful number, since it uses less digits than its factorization.

21113144112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1752681 (or 1752675 counting only the distinct ones).

The product of its digits is 192, while the sum is 21.

Adding to 21113144112 its reverse (21144131112), we get a palindrome (42257275224).

The spelling of 21113144112 in words is "twenty-one billion, one hundred thirteen million, one hundred forty-four thousand, one hundred twelve".