111100021210100 has 144 divisors (see below), whose sum is σ = 274913281798848. Its totient is φ = 38607306946560.

The previous prime is 111100021210093. The next prime is 111100021210103. The reversal of 111100021210100 is 1012120001111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111100021210103) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 987438047 + ... + 987550553.

It is an arithmetic number, because the mean of its divisors is an integer number (1909120012492).

Almost surely, 2^{111100021210100} is an apocalyptic number.

111100021210100 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 111100021210100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137456640899424).

111100021210100 is an abundant number, since it is smaller than the sum of its proper divisors (163813260588748).

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

111100021210100 is a wasteful number, since it uses less digits than its factorization.

111100021210100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157234 (or 157227 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 111100021210100 its reverse (1012120001111), we get a palindrome (112112141211211).

The spelling of 111100021210100 in words is "one hundred eleven trillion, one hundred billion, twenty-one million, two hundred ten thousand, one hundred".