20011101200 has 60 divisors (see below), whose sum is σ = 50904727380. Its totient is φ = 7533588480.

The previous prime is 20011101193. The next prime is 20011101203. The reversal of 20011101200 is 210111002.

It can be written as a sum of positive squares in 6 ways, for example, as 750102544 + 19260998656 = 27388^2 + 138784^2 .

It is a Harshad number since it is a multiple of its sum of digits (8).

It is not an unprimeable number, because it can be changed into a prime (20011101203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1464605 + ... + 1478204.

It is an arithmetic number, because the mean of its divisors is an integer number (848412123).

Almost surely, 2^20011101200 is an apocalyptic number.

20011101200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20011101200 is an abundant number, since it is smaller than the sum of its proper divisors (30893626180).

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

20011101200 is a wasteful number, since it uses less digits than its factorization.

20011101200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2942844 (or 2942833 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 20011101200 its reverse (210111002), we get a palindrome (20221212202).

The spelling of 20011101200 in words is "twenty billion, eleven million, one hundred one thousand, two hundred".