111102120000 has 840 divisors, whose sum is σ = 431185726400. Its totient is φ = 27247104000.

The previous prime is 111102119987. The next prime is 111102120001. The reversal of 111102120000 is 21201111.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (111102120001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 253079781 + ... + 253080219.

Almost surely, 2^111102120000 is an apocalyptic number.

111102120000 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 111102120000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (215592863200).

111102120000 is an abundant number, since it is smaller than the sum of its proper divisors (320083606400).

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

111102120000 is a wasteful number, since it uses less digits than its factorization.

111102120000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533 (or 505 counting only the distinct ones).

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

Adding to 111102120000 its reverse (21201111), we get a palindrome (111123321111).

The spelling of 111102120000 in words is "one hundred eleven billion, one hundred two million, one hundred twenty thousand".