1111321220 has 12 divisors (see below), whose sum is σ = 2333774604. Its totient is φ = 444528480.

The previous prime is 1111321207. The next prime is 1111321231. The reversal of 1111321220 is 221231111.

It can be written as a sum of positive squares in 2 ways, for example, as 708837376 + 402483844 = 26624^2 + 20062^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1111321195 and 1111321204.

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 3 ways as a sum of consecutive naturals, for example, 27783011 + ... + 27783050.

It is an arithmetic number, because the mean of its divisors is an integer number (194481217).

Almost surely, 2^1111321220 is an apocalyptic number.

1111321220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1111321220 is an abundant number, since it is smaller than the sum of its proper divisors (1222453384).

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

1111321220 is a wasteful number, since it uses less digits than its factorization.

1111321220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55566070 (or 55566068 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 1111321220 is about 33336.4848176889. The cubic root of 1111321220 is about 1035.8094502535.

Adding to 1111321220 its reverse (221231111), we get a palindrome (1332552331).

The spelling of 1111321220 in words is "one billion, one hundred eleven million, three hundred twenty-one thousand, two hundred twenty".