20101221110200 has 96 divisors (see below), whose sum is σ = 49196636146800. Its totient is φ = 7617066024960.

The previous prime is 20101221110161. The next prime is 20101221110207. The reversal of 20101221110200 is 201112210102.

It is a super-3 number, since 3×20101221110200³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20101221110207) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 163692024 + ... + 163814776.

Almost surely, 2^{20101221110200} is an apocalyptic number.

20101221110200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20101221110200 is an abundant number, since it is smaller than the sum of its proper divisors (29095415036600).

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

20101221110200 is a wasteful number, since it uses less digits than its factorization.

20101221110200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165881 (or 165872 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20101221110200 its reverse (201112210102), we get a palindrome (20302333320302).

The spelling of 20101221110200 in words is "twenty trillion, one hundred one billion, two hundred twenty-one million, one hundred ten thousand, two hundred".