111111111210000 has 400 divisors, whose sum is σ = 394751755252800. Its totient is φ = 26697646080000.

The previous prime is 111111111209977. The next prime is 111111111210007. The reversal of 111111111210000 is 12111111111.

It is a tau number, because it is divible by the number of its divisors (400).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (111111111210007) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 35800176 + ... + 38779824.

It is an arithmetic number, because the mean of its divisors is an integer number (986879388132).

Almost surely, 2^{111111111210000} is an apocalyptic number.

111111111210000 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 111111111210000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (197375877626400).

111111111210000 is an abundant number, since it is smaller than the sum of its proper divisors (283640644042800).

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

111111111210000 is a wasteful number, since it uses less digits than its factorization.

111111111210000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2979804 (or 2979783 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 12.

Adding to 111111111210000 its reverse (12111111111), we get a palindrome (111123222321111).

It can be divided in two parts, 11111 and 1111210000, that added together give a palindrome (1111221111).

The spelling of 111111111210000 in words is "one hundred eleven trillion, one hundred eleven billion, one hundred eleven million, two hundred ten thousand".