11011220 has 24 divisors (see below), whose sum is σ = 25226208. Its totient is φ = 4004000.

The previous prime is 11011211. The next prime is 11011243. The reversal of 11011220 is 2211011.

It is a junction number, because it is equal to n+sod(n) for n = 11011198 and 11011207.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24806 + ... + 25245.

It is an arithmetic number, because the mean of its divisors is an integer number (1051092).

Almost surely, 2^11011220 is an apocalyptic number.

11011220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11011220 is an abundant number, since it is smaller than the sum of its proper divisors (14214988).

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

11011220 is a wasteful number, since it uses less digits than its factorization.

11011220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50071 (or 50069 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 11011220 is about 3318.3158378913. The cubic root of 11011220 is about 222.4735986854.

Adding to 11011220 its reverse (2211011), we get a palindrome (13222231).

The spelling of 11011220 in words is "eleven million, eleven thousand, two hundred twenty".