11223421 has 8 divisors (see below), whose sum is σ = 12290688. Its totient is φ = 10164000.

The previous prime is 11223419. The next prime is 11223427. The reversal of 11223421 is 12432211.

11223421 = T₁₄₂₃ + T₁₄₂₄ + ... + T₁₄₃₃.

11223421 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11223421 - 2¹ = 11223419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11223395 and 11223404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11223427) 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, 1276 + ... + 4906.

It is an arithmetic number, because the mean of its divisors is an integer number (1536336).

Almost surely, 2^11223421 is an apocalyptic number.

11223421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11223421 is a deficient number, since it is larger than the sum of its proper divisors (1067267).

11223421 is a wasteful number, since it uses less digits than its factorization.

11223421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3923.

The product of its digits is 96, while the sum is 16.

The square root of 11223421 is about 3350.1374598664. The cubic root of 11223421 is about 223.8936370563.

Adding to 11223421 its reverse (12432211), we get a palindrome (23655632).

The spelling of 11223421 in words is "eleven million, two hundred twenty-three thousand, four hundred twenty-one".