11321220 has 24 divisors (see below), whose sum is σ = 31699584. Its totient is φ = 3018976.

The previous prime is 11321203. The next prime is 11321243. The reversal of 11321220 is 2212311.

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 = 11321196 and 11321205.

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 7 ways as a sum of consecutive naturals, for example, 94284 + ... + 94403.

It is an arithmetic number, because the mean of its divisors is an integer number (1320816).

Almost surely, 2^11321220 is an apocalyptic number.

11321220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11321220 is an abundant number, since it is smaller than the sum of its proper divisors (20378364).

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

11321220 is a wasteful number, since it uses less digits than its factorization.

11321220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188699 (or 188697 counting only the distinct ones).

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

The square root of 11321220 is about 3364.7020670484. The cubic root of 11321220 is about 224.5420810233.

Adding to 11321220 its reverse (2212311), we get a palindrome (13533531).

The spelling of 11321220 in words is "eleven million, three hundred twenty-one thousand, two hundred twenty".