21001233302320 has 80 divisors (see below), whose sum is σ = 48857530194720. Its totient is φ = 8395391578112.

The previous prime is 21001233302227. The next prime is 21001233302447. The reversal of 21001233302320 is 2320333210012.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×21001233302320² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21001233302291 and 21001233302300.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1549556664 + ... + 1549570216.

It is an arithmetic number, because the mean of its divisors is an integer number (610719127434).

Almost surely, 2^{21001233302320} is an apocalyptic number.

21001233302320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21001233302320 is an abundant number, since it is smaller than the sum of its proper divisors (27856296892400).

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

21001233302320 is a wasteful number, since it uses less digits than its factorization.

21001233302320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23902 (or 23896 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 21001233302320 its reverse (2320333210012), we get a palindrome (23321566512332).

The spelling of 21001233302320 in words is "twenty-one trillion, one billion, two hundred thirty-three million, three hundred two thousand, three hundred twenty".