1111022220 has 192 divisors, whose sum is σ = 3918523392. Its totient is φ = 228480000.

The previous prime is 1111022191. The next prime is 1111022257. The reversal of 1111022220 is 222201111.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1111022196 and 1111022205.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 465430 + ... + 467810.

It is an arithmetic number, because the mean of its divisors is an integer number (20408976).

Almost surely, 2^1111022220 is an apocalyptic number.

1111022220 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 1111022220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1959261696).

1111022220 is an abundant number, since it is smaller than the sum of its proper divisors (2807501172).

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

1111022220 is a wasteful number, since it uses less digits than its factorization.

1111022220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2512 (or 2510 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 1111022220 is about 33331.9999399976. Note that the first 4 decimals coincide. The cubic root of 1111022220 is about 1035.7165473797.

Adding to 1111022220 its reverse (222201111), we get a palindrome (1333223331).

The spelling of 1111022220 in words is "one billion, one hundred eleven million, twenty-two thousand, two hundred twenty".