11121123220 has 24 divisors (see below), whose sum is σ = 23484837600. Its totient is φ = 4423596192.

The previous prime is 11121123197. The next prime is 11121123227. The reversal of 11121123220 is 2232112111.

It is a junction number, because it is equal to n+sod(n) for n = 11121123194 and 11121123203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121123227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1549650 + ... + 1556809.

It is an arithmetic number, because the mean of its divisors is an integer number (978534900).

Almost surely, 2^11121123220 is an apocalyptic number.

11121123220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11121123220 is an abundant number, since it is smaller than the sum of its proper divisors (12363714380).

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

11121123220 is a wasteful number, since it uses less digits than its factorization.

11121123220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3106647 (or 3106645 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 11121123220 its reverse (2232112111), we get a palindrome (13353235331).

It can be divided in two parts, 111211 and 23220, that added together give a palindrome (134431).

The spelling of 11121123220 in words is "eleven billion, one hundred twenty-one million, one hundred twenty-three thousand, two hundred twenty".