11111022220 has 12 divisors (see below), whose sum is σ = 23333146704. Its totient is φ = 4444408880.

The previous prime is 11111022191. The next prime is 11111022253. The reversal of 11111022220 is 2222011111.

It is a self number, because there is not a number n which added to its sum of digits gives 11111022220.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 277775536 + ... + 277775575.

It is an arithmetic number, because the mean of its divisors is an integer number (1944428892).

Almost surely, 2^11111022220 is an apocalyptic number.

11111022220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11111022220 is an abundant number, since it is smaller than the sum of its proper divisors (12222124484).

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

11111022220 is a wasteful number, since it uses less digits than its factorization.

11111022220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555551120 (or 555551118 counting only the distinct ones).

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

Adding to 11111022220 its reverse (2222011111), we get a palindrome (13333033331).

The spelling of 11111022220 in words is "eleven billion, one hundred eleven million, twenty-two thousand, two hundred twenty".