21331114344 has 128 divisors (see below), whose sum is σ = 62923132800. Its totient is φ = 6672430080.

The previous prime is 21331114333. The next prime is 21331114367. The reversal of 21331114344 is 44341113312.

21331114344 is a `hidden beast` number, since 2 + 1 + 3 + 311 + 1 + 4 + 344 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1265814 + ... + 1282554.

It is an arithmetic number, because the mean of its divisors is an integer number (491586975).

Almost surely, 2^21331114344 is an apocalyptic number.

21331114344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21331114344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31461566400).

21331114344 is an abundant number, since it is smaller than the sum of its proper divisors (41592018456).

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

21331114344 is a wasteful number, since it uses less digits than its factorization.

21331114344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17120 (or 17110 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

Adding to 21331114344 its reverse (44341113312), we get a palindrome (65672227656).

The spelling of 21331114344 in words is "twenty-one billion, three hundred thirty-one million, one hundred fourteen thousand, three hundred forty-four".