20100112200 has 768 divisors, whose sum is σ = 82280448000. Its totient is φ = 4415523840.

The previous prime is 20100112189. The next prime is 20100112213. The reversal of 20100112200 is 221100102.

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

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 158268537 + ... + 158268663.

It is an arithmetic number, because the mean of its divisors is an integer number (107136000).

Almost surely, 2^20100112200 is an apocalyptic number.

20100112200 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 20100112200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41140224000).

20100112200 is an abundant number, since it is smaller than the sum of its proper divisors (62180335800).

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

20100112200 is a wasteful number, since it uses less digits than its factorization.

20100112200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291 (or 276 counting only the distinct ones).

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

Adding to 20100112200 its reverse (221100102), we get a palindrome (20321212302).

The spelling of 20100112200 in words is "twenty billion, one hundred million, one hundred twelve thousand, two hundred".