20011201200 has 240 divisors, whose sum is σ = 71590656000. Its totient is φ = 5308934400.

The previous prime is 20011201163. The next prime is 20011201207. The reversal of 20011201200 is 210211002.

It is a tau number, because it is divible by the number of its divisors (240).

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

It is not an unprimeable number, because it can be changed into a prime (20011201207) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2144545 + ... + 2153855.

It is an arithmetic number, because the mean of its divisors is an integer number (298294400).

Almost surely, 2^20011201200 is an apocalyptic number.

20011201200 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 20011201200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35795328000).

20011201200 is an abundant number, since it is smaller than the sum of its proper divisors (51579454800).

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

20011201200 is a wasteful number, since it uses less digits than its factorization.

20011201200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9537 (or 9520 counting only the distinct ones).

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

Adding to 20011201200 its reverse (210211002), we get a palindrome (20221412202).

The spelling of 20011201200 in words is "twenty billion, eleven million, two hundred one thousand, two hundred".