11112122220 has 24 divisors (see below), whose sum is σ = 31113942384. Its totient is φ = 2963232576.

The previous prime is 11112122213. The next prime is 11112122237. The reversal of 11112122220 is 2222121111.

11112122220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 11112122220.

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 7 ways as a sum of consecutive naturals, for example, 92600959 + ... + 92601078.

It is an arithmetic number, because the mean of its divisors is an integer number (1296414266).

Almost surely, 2^11112122220 is an apocalyptic number.

11112122220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11112122220 is an abundant number, since it is smaller than the sum of its proper divisors (20001820164).

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

11112122220 is a wasteful number, since it uses less digits than its factorization.

11112122220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185202049 (or 185202047 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 11112122220 its reverse (2222121111), we get a palindrome (13334243331).

The spelling of 11112122220 in words is "eleven billion, one hundred twelve million, one hundred twenty-two thousand, two hundred twenty".