111001321200 has 960 divisors, whose sum is σ = 487111680000. Its totient is φ = 20893593600.

The previous prime is 111001321187. The next prime is 111001321237. The reversal of 111001321200 is 2123100111.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

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, 40377426 + ... + 40380174.

It is an arithmetic number, because the mean of its divisors is an integer number (507408000).

Almost surely, 2^111001321200 is an apocalyptic number.

111001321200 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 111001321200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (243555840000).

111001321200 is an abundant number, since it is smaller than the sum of its proper divisors (376110358800).

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

111001321200 is a wasteful number, since it uses less digits than its factorization.

111001321200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2830 (or 2819 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 111001321200 its reverse (2123100111), we get a palindrome (113124421311).

Subtracting from 111001321200 its reverse (2123100111), we obtain a square (108878221089 = 329967²).

The spelling of 111001321200 in words is "one hundred eleven billion, one million, three hundred twenty-one thousand, two hundred".