21003201222320 has 80 divisors (see below), whose sum is σ = 53637465911040. Its totient is φ = 7613059652352.

The previous prime is 21003201222317. The next prime is 21003201222349. The reversal of 21003201222320 is 2322210230012.

It is a happy number.

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

It is a super-2 number, since 2×21003201222320² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 21003201222292 and 21003201222301.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 300354074 + ... + 300423993.

It is an arithmetic number, because the mean of its divisors is an integer number (670468323888).

Almost surely, 2^{21003201222320} is an apocalyptic number.

21003201222320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21003201222320 is an abundant number, since it is smaller than the sum of its proper divisors (32634264688720).

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

21003201222320 is a wasteful number, since it uses less digits than its factorization.

21003201222320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600778122 (or 600778116 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21003201222320 its reverse (2322210230012), we get a palindrome (23325411452332).

The spelling of 21003201222320 in words is "twenty-one trillion, three billion, two hundred one million, two hundred twenty-two thousand, three hundred twenty".