20011221320200 has 96 divisors (see below), whose sum is σ = 50935084544160. Its totient is φ = 7251094425600.

The previous prime is 20011221320191. The next prime is 20011221320219. The reversal of 20011221320200 is 202312211002.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15448089 + ... + 16693288.

It is an arithmetic number, because the mean of its divisors is an integer number (530573797335).

Almost surely, 2^{20011221320200} is an apocalyptic number.

20011221320200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20011221320200 is an abundant number, since it is smaller than the sum of its proper divisors (30923863223960).

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

20011221320200 is a wasteful number, since it uses less digits than its factorization.

20011221320200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32141687 (or 32141678 counting only the distinct ones).

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

Adding to 20011221320200 its reverse (202312211002), we get a palindrome (20213533531202).

The spelling of 20011221320200 in words is "twenty trillion, eleven billion, two hundred twenty-one million, three hundred twenty thousand, two hundred".