21301321320000 has 210 divisors, whose sum is σ = 76296068097678. Its totient is φ = 5680352256000.

The previous prime is 21301321319977. The next prime is 21301321320017. The reversal of 21301321320000 is 2312310312.

21301321320000 is a `hidden beast` number, since 21 + 3 + 0 + 1 + 321 + 320 + 0 + 0 + 0 = 666.

It can be written as a sum of positive squares in 5 ways, for example, as 11924203484736 + 9377117835264 = 3453144^2 + 3062208^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 29225169 + ... + 29945168.

Almost surely, 2^{21301321320000} is an apocalyptic number.

21301321320000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21301321320000 is an abundant number, since it is smaller than the sum of its proper divisors (54994746777678).

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

21301321320000 is an equidigital number, since it uses as much as digits as its factorization.

21301321320000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59170375 (or 59170347 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21301321320000 its reverse (2312310312), we get a palindrome (21303633630312).

The spelling of 21301321320000 in words is "twenty-one trillion, three hundred one billion, three hundred twenty-one million, three hundred twenty thousand".