20011112200 has 24 divisors (see below), whose sum is σ = 46525836330. Its totient is φ = 8004444800.

The previous prime is 20011112137. The next prime is 20011112207. The reversal of 20011112200 is 221111002.

It can be written as a sum of positive squares in 3 ways, for example, as 9362110564 + 10649001636 = 96758^2 + 103194^2 .

It is a super-2 number, since 2×20011112200² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (20011112207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 50027581 + ... + 50027980.

Almost surely, 2^20011112200 is an apocalyptic number.

20011112200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20011112200 is an abundant number, since it is smaller than the sum of its proper divisors (26514724130).

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

20011112200 is a wasteful number, since it uses less digits than its factorization.

20011112200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100055577 (or 100055568 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20011112200 its reverse (221111002), we get a palindrome (20232223202).

The spelling of 20011112200 in words is "twenty billion, eleven million, one hundred twelve thousand, two hundred".