21450320152125 has 16 divisors (see below), whose sum is σ = 35693332733760. Its totient is φ = 11440170747600.

The previous prime is 21450320152123. The next prime is 21450320152223. The reversal of 21450320152125 is 52125102305412.

21450320152125 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 21450320152125 - 2¹ = 21450320152123 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21450320152123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28600426495 + ... + 28600427244.

It is an arithmetic number, because the mean of its divisors is an integer number (2230833295860).

Almost surely, 2^{21450320152125} is an apocalyptic number.

21450320152125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21450320152125 is a deficient number, since it is larger than the sum of its proper divisors (14243012581635).

21450320152125 is an equidigital number, since it uses as much as digits as its factorization.

21450320152125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57200853757 (or 57200853747 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 33.

Adding to 21450320152125 its reverse (52125102305412), we get a palindrome (73575422457537).

The spelling of 21450320152125 in words is "twenty-one trillion, four hundred fifty billion, three hundred twenty million, one hundred fifty-two thousand, one hundred twenty-five".