111122122122120 has 128 divisors (see below), whose sum is σ = 339033703680000. Its totient is φ = 29128853134080.

The previous prime is 111122122122113. The next prime is 111122122122131. The reversal of 111122122122120 is 21221221221111.

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 31 ways as a sum of consecutive naturals, for example, 144040215 + ... + 144809625.

It is an arithmetic number, because the mean of its divisors is an integer number (2648700810000).

Almost surely, 2^{111122122122120} is an apocalyptic number.

111122122122120 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 111122122122120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169516851840000).

111122122122120 is an abundant number, since it is smaller than the sum of its proper divisors (227911581557880).

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

111122122122120 is a wasteful number, since it uses less digits than its factorization.

111122122122120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 789883 (or 789879 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 111122122122120 its reverse (21221221221111), we get a palindrome (132343343343231).

The spelling of 111122122122120 in words is "one hundred eleven trillion, one hundred twenty-two billion, one hundred twenty-two million, one hundred twenty-two thousand, one hundred twenty".