21044301125 has 8 divisors (see below), whose sum is σ = 26263287960. Its totient is φ = 16835440800.

The previous prime is 21044301121. The next prime is 21044301133. The reversal of 21044301125 is 52110344012.

It can be written as a sum of positive squares in 4 ways, for example, as 2732257441 + 18312043684 = 52271^2 + 135322^2 .

It is not a de Polignac number, because 21044301125 - 2² = 21044301121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21044301125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21044301121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84177080 + ... + 84177329.

It is an arithmetic number, because the mean of its divisors is an integer number (3282910995).

Almost surely, 2^21044301125 is an apocalyptic number.

21044301125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21044301125 is a deficient number, since it is larger than the sum of its proper divisors (5218986835).

21044301125 is an equidigital number, since it uses as much as digits as its factorization.

21044301125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168354424 (or 168354414 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 21044301125 its reverse (52110344012), we get a palindrome (73154645137).

The spelling of 21044301125 in words is "twenty-one billion, forty-four million, three hundred one thousand, one hundred twenty-five".