111021120000 has 600 divisors, whose sum is σ = 457671573216. Its totient is φ = 25371648000.

The previous prime is 111021119999. The next prime is 111021120011. The reversal of 111021120000 is 21120111.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (600).

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

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 20157247 + ... + 20162753.

Almost surely, 2^111021120000 is an apocalyptic number.

111021120000 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 111021120000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (228835786608).

111021120000 is an abundant number, since it is smaller than the sum of its proper divisors (346650453216).

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

111021120000 is an frugal number, since it uses more digits than its factorization.

111021120000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5558 (or 5524 counting only the distinct ones).

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

Adding to 111021120000 its reverse (21120111), we get a palindrome (111042240111).

The spelling of 111021120000 in words is "one hundred eleven billion, twenty-one million, one hundred twenty thousand".