111211100000 has 864 divisors, whose sum is σ = 373888944576. Its totient is φ = 31680000000.

The previous prime is 111211099957. The next prime is 111211100023. The reversal of 111211100000 is 1112111.

It is a happy number.

111211100000 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 (8).

It is a congruent number.

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 143 ways as a sum of consecutive naturals, for example, 1101099950 + ... + 1101100050.

It is an arithmetic number, because the mean of its divisors is an integer number (432741834).

Almost surely, 2^111211100000 is an apocalyptic number.

111211100000 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 111211100000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (186944472288).

111211100000 is an abundant number, since it is smaller than the sum of its proper divisors (262677844576).

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

111211100000 is a wasteful number, since it uses less digits than its factorization.

111211100000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178 (or 139 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 111211100000 its reverse (1112111), we get a palindrome (111212212111).

111211100000 divided by its reverse (1112111) gives a 5-th power (100000 = 10⁵).

The spelling of 111211100000 in words is "one hundred eleven billion, two hundred eleven million, one hundred thousand".