111222112121120 has 288 divisors, whose sum is σ = 359099648139456. Its totient is φ = 31999968000000.

The previous prime is 111222112121053. The next prime is 111222112121123. The reversal of 111222112121120 is 21121211222111.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 111222112121092 and 111222112121101.

It is not an unprimeable number, because it can be changed into a prime (111222112121123) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 48482006 + ... + 50724245.

It is an arithmetic number, because the mean of its divisors is an integer number (1246873778262).

Almost surely, 2^{111222112121120} is an apocalyptic number.

111222112121120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111222112121120 is an abundant number, since it is smaller than the sum of its proper divisors (247877536018336).

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

111222112121120 is a wasteful number, since it uses less digits than its factorization.

111222112121120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99206304 (or 99206289 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 111222112121120 its reverse (21121211222111), we get a palindrome (132343323343231).

The spelling of 111222112121120 in words is "one hundred eleven trillion, two hundred twenty-two billion, one hundred twelve million, one hundred twenty-one thousand, one hundred twenty".