21141225544 has 64 divisors (see below), whose sum is σ = 41493513600. Its totient is φ = 10089171456.

The previous prime is 21141225503. The next prime is 21141225557. The reversal of 21141225544 is 44552214112.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4792812 + ... + 4797220.

It is an arithmetic number, because the mean of its divisors is an integer number (648336150).

Almost surely, 2^21141225544 is an apocalyptic number.

It is an amenable number.

21141225544 is a deficient number, since it is larger than the sum of its proper divisors (20352288056).

21141225544 is a wasteful number, since it uses less digits than its factorization.

21141225544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4774 (or 4770 counting only the distinct ones).

The product of its digits is 12800, while the sum is 31.

Adding to 21141225544 its reverse (44552214112), we get a palindrome (65693439656).

The spelling of 21141225544 in words is "twenty-one billion, one hundred forty-one million, two hundred twenty-five thousand, five hundred forty-four".