111121200000 has 384 divisors, whose sum is σ = 409965948000. Its totient is φ = 29629440000.

The previous prime is 111121199977. The next prime is 111121200041. The reversal of 111121200000 is 2121111.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (384).

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

It is a congruent number.

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, 10794856 + ... + 10805144.

Almost surely, 2^111121200000 is an apocalyptic number.

111121200000 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 111121200000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (204982974000).

111121200000 is an abundant number, since it is smaller than the sum of its proper divisors (298844748000).

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

111121200000 is an frugal number, since it uses more digits than its factorization.

111121200000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10337 (or 10299 counting only the distinct ones).

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

Adding to 111121200000 its reverse (2121111), we get a palindrome (111123321111).

The spelling of 111121200000 in words is "one hundred eleven billion, one hundred twenty-one million, two hundred thousand".