20111101200 has 300 divisors, whose sum is σ = 74509143808. Its totient is φ = 5189702400.

The previous prime is 20111101193. The next prime is 20111101217. The reversal of 20111101200 is 210111102.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (300).

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

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 994389 + ... + 1014411.

Almost surely, 2^20111101200 is an apocalyptic number.

20111101200 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 20111101200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37254571904).

20111101200 is an abundant number, since it is smaller than the sum of its proper divisors (54398042608).

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

20111101200 is a wasteful number, since it uses less digits than its factorization.

20111101200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20084 (or 20064 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 20111101200 its reverse (210111102), we get a palindrome (20321212302).

The spelling of 20111101200 in words is "twenty billion, one hundred eleven million, one hundred one thousand, two hundred".