11221420 has 24 divisors (see below), whose sum is σ = 26931744. Its totient is φ = 3847296.

The previous prime is 11221417. The next prime is 11221423. The reversal of 11221420 is 2412211.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (11221417) and next prime (11221423).

It is a self number, because there is not a number n which added to its sum of digits gives 11221420.

It is not an unprimeable number, because it can be changed into a prime (11221423) by changing a digit.

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, 39937 + ... + 40216.

It is an arithmetic number, because the mean of its divisors is an integer number (1122156).

Almost surely, 2^11221420 is an apocalyptic number.

11221420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11221420 is an abundant number, since it is smaller than the sum of its proper divisors (15710324).

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

11221420 is a wasteful number, since it uses less digits than its factorization.

11221420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80169 (or 80167 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 11221420 is about 3349.8388020918. The cubic root of 11221420 is about 223.8803304244.

Adding to 11221420 its reverse (2412211), we get a palindrome (13633631).

The spelling of 11221420 in words is "eleven million, two hundred twenty-one thousand, four hundred twenty".