21210120300320 has 48 divisors (see below), whose sum is σ = 57267324813888. Its totient is φ = 7272041245440.

The previous prime is 21210120300289. The next prime is 21210120300371. The reversal of 21210120300320 is 2300302101212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9468802586 + ... + 9468804825.

It is an arithmetic number, because the mean of its divisors is an integer number (1193069266956).

Almost surely, 2^{21210120300320} is an apocalyptic number.

21210120300320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21210120300320 is an abundant number, since it is smaller than the sum of its proper divisors (36057204513568).

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

21210120300320 is a wasteful number, since it uses less digits than its factorization.

21210120300320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18937607433 (or 18937607425 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21210120300320 its reverse (2300302101212), we get a palindrome (23510422401532).

The spelling of 21210120300320 in words is "twenty-one trillion, two hundred ten billion, one hundred twenty million, three hundred thousand, three hundred twenty".