21044301025 has 12 divisors (see below), whose sum is σ = 28467200304. Its totient is φ = 15304946000.

The previous prime is 21044301017. The next prime is 21044301043. The reversal of 21044301025 is 52010344012.

It is not a de Polignac number, because 21044301025 - 2³ = 21044301017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21044300987 and 21044301005.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 38262091 + ... + 38262640.

It is an arithmetic number, because the mean of its divisors is an integer number (2372266692).

Almost surely, 2^21044301025 is an apocalyptic number.

21044301025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21044301025 is a deficient number, since it is larger than the sum of its proper divisors (7422899279).

21044301025 is a wasteful number, since it uses less digits than its factorization.

21044301025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76524752 (or 76524747 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

Adding to 21044301025 its reverse (52010344012), we get a palindrome (73054645037).

The spelling of 21044301025 in words is "twenty-one billion, forty-four million, three hundred one thousand, twenty-five".