111211211111120 has 80 divisors (see below), whose sum is σ = 259153368122880. Its totient is φ = 44383464609792.

The previous prime is 111211211111101. The next prime is 111211211111177. The reversal of 111211211111120 is 21111112112111.

It is a happy number.

111211211111120 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 342050072 + ... + 342375048.

It is an arithmetic number, because the mean of its divisors is an integer number (3239417101536).

Almost surely, 2^{111211211111120} is an apocalyptic number.

111211211111120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111211211111120 is an abundant number, since it is smaller than the sum of its proper divisors (147942157011760).

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

111211211111120 is a wasteful number, since it uses less digits than its factorization.

111211211111120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334692 (or 334686 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 17.

Adding to 111211211111120 its reverse (21111112112111), we get a palindrome (132322323223231).

The spelling of 111211211111120 in words is "one hundred eleven trillion, two hundred eleven billion, two hundred eleven million, one hundred eleven thousand, one hundred twenty".