11111222122120 has 32 divisors (see below), whose sum is σ = 25423982827200. Its totient is φ = 4369158528448.

The previous prime is 11111222122109. The next prime is 11111222122157. The reversal of 11111222122120 is 2122122211111.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2354070124 + ... + 2354074843.

It is an arithmetic number, because the mean of its divisors is an integer number (794499463350).

Almost surely, 2^{11111222122120} is an apocalyptic number.

11111222122120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11111222122120 is an abundant number, since it is smaller than the sum of its proper divisors (14312760705080).

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

11111222122120 is a wasteful number, since it uses less digits than its factorization.

11111222122120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4708145037 (or 4708145033 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 11111222122120 its reverse (2122122211111), we get a palindrome (13233344333231).

The spelling of 11111222122120 in words is "eleven trillion, one hundred eleven billion, two hundred twenty-two million, one hundred twenty-two thousand, one hundred twenty".