111111012100000 has 288 divisors, whose sum is σ = 298449201903552. Its totient is φ = 40380556800000.

The previous prime is 111111012099953. The next prime is 111111012100013. The reversal of 111111012100000 is 1210111111.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a self number, because there is not a number n which added to its sum of digits gives 111111012100000.

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, 1954671579 + ... + 1954728421.

It is an arithmetic number, because the mean of its divisors is an integer number (1036281951054).

Almost surely, 2^{111111012100000} is an apocalyptic number.

111111012100000 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 111111012100000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149224600951776).

111111012100000 is an abundant number, since it is smaller than the sum of its proper divisors (187338189803552).

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

111111012100000 is an equidigital number, since it uses as much as digits as its factorization.

111111012100000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58666 (or 58638 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 10.

Adding to 111111012100000 its reverse (1210111111), we get a palindrome (111112222211111).

The spelling of 111111012100000 in words is "one hundred eleven trillion, one hundred eleven billion, twelve million, one hundred thousand".