11212111120 has 160 divisors (see below), whose sum is σ = 30144284928. Its totient is φ = 3799056384.

The previous prime is 11212111087. The next prime is 11212111123. The reversal of 11212111120 is 2111121211.

It is a happy number.

It is a super-2 number, since 2×11212111120² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11212111120.

It is not an unprimeable number, because it can be changed into a prime (11212111123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24533932 + ... + 24534388.

Almost surely, 2^11212111120 is an apocalyptic number.

11212111120 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 11212111120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15072142464).

11212111120 is an abundant number, since it is smaller than the sum of its proper divisors (18932173808).

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

11212111120 is a wasteful number, since it uses less digits than its factorization.

11212111120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 897 (or 891 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 11212111120 its reverse (2111121211), we get a palindrome (13323232331).

The spelling of 11212111120 in words is "eleven billion, two hundred twelve million, one hundred eleven thousand, one hundred twenty".