21441025452125 has 16 divisors (see below), whose sum is σ = 26897044352880. Its totient is φ = 17063945625600.

The previous prime is 21441025452113. The next prime is 21441025452149. The reversal of 21441025452125 is 52125452014412.

It can be written as a sum of positive squares in 8 ways, for example, as 8633659779481 + 12807365672644 = 2938309^2 + 3578738^2 .

It is not a de Polignac number, because 21441025452125 - 2⁸ = 21441025451869 is a prime.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 444349460 + ... + 444397709.

It is an arithmetic number, because the mean of its divisors is an integer number (1681065272055).

Almost surely, 2^{21441025452125} is an apocalyptic number.

21441025452125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21441025452125 is a deficient number, since it is larger than the sum of its proper divisors (5456018900755).

21441025452125 is an equidigital number, since it uses as much as digits as its factorization.

21441025452125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888747377 (or 888747367 counting only the distinct ones).

The product of its (nonzero) digits is 128000, while the sum is 38.

Adding to 21441025452125 its reverse (52125452014412), we get a palindrome (73566477466537).

The spelling of 21441025452125 in words is "twenty-one trillion, four hundred forty-one billion, twenty-five million, four hundred fifty-two thousand, one hundred twenty-five".