20021100221320 has 32 divisors (see below), whose sum is σ = 49142700544320. Its totient is φ = 7280400080320.

The previous prime is 20021100221293. The next prime is 20021100221333. The reversal of 20021100221320 is 2312200112002.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20021100221294 and 20021100221303.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22751249812 + ... + 22751250691.

It is an arithmetic number, because the mean of its divisors is an integer number (1535709392010).

Almost surely, 2^{20021100221320} is an apocalyptic number.

20021100221320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20021100221320 is an abundant number, since it is smaller than the sum of its proper divisors (29121600323000).

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

20021100221320 is a wasteful number, since it uses less digits than its factorization.

20021100221320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45502500525 (or 45502500521 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20021100221320 its reverse (2312200112002), we get a palindrome (22333300333322).

The spelling of 20021100221320 in words is "twenty trillion, twenty-one billion, one hundred million, two hundred twenty-one thousand, three hundred twenty".