21331141144 has 8 divisors (see below), whose sum is σ = 39995889660. Its totient is φ = 10665570568.

The previous prime is 21331141123. The next prime is 21331141157. The reversal of 21331141144 is 44114113312.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1333196314 + ... + 1333196329.

Almost surely, 2^21331141144 is an apocalyptic number.

It is an amenable number.

21331141144 is a deficient number, since it is larger than the sum of its proper divisors (18664748516).

21331141144 is a wasteful number, since it uses less digits than its factorization.

21331141144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2666392649 (or 2666392645 counting only the distinct ones).

The product of its digits is 1152, while the sum is 25.

Adding to 21331141144 its reverse (44114113312), we get a palindrome (65445254456).

The spelling of 21331141144 in words is "twenty-one billion, three hundred thirty-one million, one hundred forty-one thousand, one hundred forty-four".