111200121000100 has 144 divisors (see below), whose sum is σ = 263948106240000. Its totient is φ = 40327928784000.

The previous prime is 111200121000083. The next prime is 111200121000119. The reversal of 111200121000100 is 1000121002111.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 652884751 + ... + 653055049.

It is an arithmetic number, because the mean of its divisors is an integer number (1832972960000).

Almost surely, 2^{111200121000100} is an apocalyptic number.

111200121000100 is a gapful number since it is divisible by the number (10) 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 111200121000100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131974053120000).

111200121000100 is an abundant number, since it is smaller than the sum of its proper divisors (152747985239900).

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

111200121000100 is a wasteful number, since it uses less digits than its factorization.

111200121000100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171914 (or 171907 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 111200121000100 its reverse (1000121002111), we get a palindrome (112200242002211).

The spelling of 111200121000100 in words is "one hundred eleven trillion, two hundred billion, one hundred twenty-one million, one hundred", and thus it is an aban number.