1111222220 has 24 divisors (see below), whose sum is σ = 2456386800. Its totient is φ = 421094592.

The previous prime is 1111222213. The next prime is 1111222223. The reversal of 1111222220 is 222221111.

It is a junction number, because it is equal to n+sod(n) for n = 1111222195 and 1111222204.

It is not an unprimeable number, because it can be changed into a prime (1111222223) by changing a digit.

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, 1461755 + ... + 1462514.

It is an arithmetic number, because the mean of its divisors is an integer number (102349450).

Almost surely, 2^1111222220 is an apocalyptic number.

1111222220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1111222220 is an abundant number, since it is smaller than the sum of its proper divisors (1345164580).

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

1111222220 is a wasteful number, since it uses less digits than its factorization.

1111222220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2924297 (or 2924295 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 1111222220 is about 33334.9999250037. Note that the first 4 decimals coincide. The cubic root of 1111222220 is about 1035.7786916157.

Adding to 1111222220 its reverse (222221111), we get a palindrome (1333443331).

The spelling of 1111222220 in words is "one billion, one hundred eleven million, two hundred twenty-two thousand, two hundred twenty".