21044134401 has 8 divisors (see below), whose sum is σ = 28069456704. Its totient is φ = 14024117520.

The previous prime is 21044134297. The next prime is 21044134421. The reversal of 21044134401 is 10443144012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21044134401 - 2²³ = 21035745793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21044134421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1317090 + ... + 1332971.

It is an arithmetic number, because the mean of its divisors is an integer number (3508682088).

Almost surely, 2^21044134401 is an apocalyptic number.

It is an amenable number.

21044134401 is a deficient number, since it is larger than the sum of its proper divisors (7025322303).

21044134401 is a wasteful number, since it uses less digits than its factorization.

21044134401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2652711.

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 21044134401 its reverse (10443144012), we get a palindrome (31487278413).

The spelling of 21044134401 in words is "twenty-one billion, forty-four million, one hundred thirty-four thousand, four hundred one".