11121320220 has 48 divisors (see below), whose sum is σ = 31145106048. Its totient is φ = 2965170240.

The previous prime is 11121320191. The next prime is 11121320257. The reversal of 11121320220 is 2202312111.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 11121320220.

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, 438075 + ... + 462765.

It is an arithmetic number, because the mean of its divisors is an integer number (648856376).

Almost surely, 2^11121320220 is an apocalyptic number.

11121320220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11121320220 is an abundant number, since it is smaller than the sum of its proper divisors (20023785828).

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

11121320220 is a wasteful number, since it uses less digits than its factorization.

11121320220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32210 (or 32208 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 11121320220 its reverse (2202312111), we get a palindrome (13323632331).

The spelling of 11121320220 in words is "eleven billion, one hundred twenty-one million, three hundred twenty thousand, two hundred twenty".