21531321301120 has 32 divisors (see below), whose sum is σ = 51473314987020. Its totient is φ = 8612528520192.

The previous prime is 21531321301117. The next prime is 21531321301123. The reversal of 21531321301120 is 2110312313512.

It is an interprime number because it is at equal distance from previous prime (21531321301117) and next prime (21531321301123).

It can be written as a sum of positive squares in 2 ways, for example, as 21529674240064 + 1647061056 = 4640008^2 + 40584^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (21531321301123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16821344127 + ... + 16821345406.

Almost surely, 2^{21531321301120} is an apocalyptic number.

21531321301120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21531321301120 is an abundant number, since it is smaller than the sum of its proper divisors (29941993685900).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21531321301120 is an equidigital number, since it uses as much as digits as its factorization.

21531321301120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33642689552 (or 33642689540 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

Adding to 21531321301120 its reverse (2110312313512), we get a palindrome (23641633614632).

The spelling of 21531321301120 in words is "twenty-one trillion, five hundred thirty-one billion, three hundred twenty-one million, three hundred one thousand, one hundred twenty".