11121220120 has 64 divisors (see below), whose sum is σ = 25508527200. Its totient is φ = 4362716160.

The previous prime is 11121220069. The next prime is 11121220139. The reversal of 11121220120 is 2102212111.

It is a self number, because there is not a number n which added to its sum of digits gives 11121220120.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 604660 + ... + 622780.

Almost surely, 2^11121220120 is an apocalyptic number.

11121220120 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 11121220120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12754263600).

11121220120 is an abundant number, since it is smaller than the sum of its proper divisors (14387307080).

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

11121220120 is a wasteful number, since it uses less digits than its factorization.

11121220120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18428 (or 18424 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 11121220120 its reverse (2102212111), we get a palindrome (13223432231).

The spelling of 11121220120 in words is "eleven billion, one hundred twenty-one million, two hundred twenty thousand, one hundred twenty".