21331114444 has 12 divisors (see below), whose sum is σ = 38239924968. Its totient is φ = 10405421600.

The previous prime is 21331114397. The next prime is 21331114451. The reversal of 21331114444 is 44441113312.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65033722 + ... + 65034049.

It is an arithmetic number, because the mean of its divisors is an integer number (3186660414).

Almost surely, 2^21331114444 is an apocalyptic number.

It is an amenable number.

21331114444 is a deficient number, since it is larger than the sum of its proper divisors (16908810524).

21331114444 is a wasteful number, since it uses less digits than its factorization.

21331114444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130067816 (or 130067814 counting only the distinct ones).

The product of its digits is 4608, while the sum is 28.

Adding to 21331114444 its reverse (44441113312), we get a palindrome (65772227756).

The spelling of 21331114444 in words is "twenty-one billion, three hundred thirty-one million, one hundred fourteen thousand, four hundred forty-four".