111200120100 has 216 divisors, whose sum is σ = 379548624000. Its totient is φ = 27123828480.

The previous prime is 111200120077. The next prime is 111200120111. The reversal of 111200120100 is 1021002111.

It is a happy number.

111200120100 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 383781 + ... + 608019.

Almost surely, 2^111200120100 is an apocalyptic number.

111200120100 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 111200120100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (189774312000).

111200120100 is an abundant number, since it is smaller than the sum of its proper divisors (268348503900).

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

111200120100 is a wasteful number, since it uses less digits than its factorization.

111200120100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224307 (or 224297 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 111200120100 its reverse (1021002111), we get a palindrome (112221122211).

The spelling of 111200120100 in words is "one hundred eleven billion, two hundred million, one hundred twenty thousand, one hundred".