11223621 has 24 divisors (see below), whose sum is σ = 17348760. Its totient is φ = 6967296.

The previous prime is 11223593. The next prime is 11223631. The reversal of 11223621 is 12632211.

It can be written as a sum of positive squares in 4 ways, for example, as 3101121 + 8122500 = 1761^2 + 2850^2 .

It is not a de Polignac number, because 11223621 - 2⁶ = 11223557 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11223594 and 11223603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11223631) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16341 + ... + 17013.

It is an arithmetic number, because the mean of its divisors is an integer number (722865).

Almost surely, 2^11223621 is an apocalyptic number.

It is an amenable number.

11223621 is a deficient number, since it is larger than the sum of its proper divisors (6125139).

11223621 is a wasteful number, since it uses less digits than its factorization.

11223621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805 (or 802 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 11223621 is about 3350.1673092549. The cubic root of 11223621 is about 223.8949669676.

Adding to 11223621 its reverse (12632211), we get a palindrome (23855832).

The spelling of 11223621 in words is "eleven million, two hundred twenty-three thousand, six hundred twenty-one".