11212222120 has 128 divisors (see below), whose sum is σ = 28066953600. Its totient is φ = 3996748800.

The previous prime is 11212222097. The next prime is 11212222141. The reversal of 11212222120 is 2122221211.

It is a happy number.

11212222120 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 11212222094 and 11212222103.

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 31 ways as a sum of consecutive naturals, for example, 11245462 + ... + 11246458.

It is an arithmetic number, because the mean of its divisors is an integer number (219273075).

Almost surely, 2^11212222120 is an apocalyptic number.

11212222120 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 11212222120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14033476800).

11212222120 is an abundant number, since it is smaller than the sum of its proper divisors (16854731480).

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

11212222120 is a wasteful number, since it uses less digits than its factorization.

11212222120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1499 (or 1495 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 11212222120 its reverse (2122221211), we get a palindrome (13334443331).

Subtracting from 11212222120 its reverse (2122221211), we obtain a palindrome (9090000909).

It can be divided in two parts, 11212 and 222120, that added together give a palindrome (233332).

The spelling of 11212222120 in words is "eleven billion, two hundred twelve million, two hundred twenty-two thousand, one hundred twenty".