20001100201200 has 360 divisors, whose sum is σ = 70472188661888. Its totient is φ = 5252017605120.

The previous prime is 20001100201177. The next prime is 20001100201207. The reversal of 20001100201200 is 210200110002.

It is a tau number, because it is divible by the number of its divisors (360).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001100201207) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 696330039 + ... + 696358761.

Almost surely, 2^{20001100201200} is an apocalyptic number.

20001100201200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20001100201200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35236094330944).

20001100201200 is an abundant number, since it is smaller than the sum of its proper divisors (50471088460688).

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

20001100201200 is a wasteful number, since it uses less digits than its factorization.

20001100201200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31701 (or 31687 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20001100201200 its reverse (210200110002), we get a palindrome (20211300311202).

The spelling of 20001100201200 in words is "twenty trillion, one billion, one hundred million, two hundred one thousand, two hundred".