11221320 has 64 divisors (see below), whose sum is σ = 36728640. Its totient is φ = 2720000.

The previous prime is 11221307. The next prime is 11221333. The reversal of 11221320 is 2312211.

It is an interprime number because it is at equal distance from previous prime (11221307) and next prime (11221333).

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 = 11221296 and 11221305.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2931 + ... + 5570.

It is an arithmetic number, because the mean of its divisors is an integer number (573885).

Almost surely, 2^11221320 is an apocalyptic number.

11221320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11221320 is an abundant number, since it is smaller than the sum of its proper divisors (25507320).

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

11221320 is a wasteful number, since it uses less digits than its factorization.

11221320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8526 (or 8522 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 11221320 is about 3349.8238759672. The cubic root of 11221320 is about 223.8796653839.

Adding to 11221320 its reverse (2312211), we get a palindrome (13533531).

It can be divided in two parts, 1122 and 1320, that added together give a palindrome (2442).

The spelling of 11221320 in words is "eleven million, two hundred twenty-one thousand, three hundred twenty".