11227421 has 2 divisors, whose sum is σ = 11227422. Its totient is φ = 11227420.

The previous prime is 11227393. The next prime is 11227441. The reversal of 11227421 is 12472211.

11227421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (11227441) can be obtained adding 11227421 to its sum of digits (20).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8702500 + 2524921 = 2950^2 + 1589^2 .

It is an emirp because it is prime and its reverse (12472211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11227421 - 2⁶ = 11227357 is a prime.

It is a super-2 number, since 2×11227421² = 252109964622482, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11227393 and 11227402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11227441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5613710 + 5613711.

It is an arithmetic number, because the mean of its divisors is an integer number (5613711).

Almost surely, 2^11227421 is an apocalyptic number.

It is an amenable number.

11227421 is a deficient number, since it is larger than the sum of its proper divisors (1).

11227421 is an equidigital number, since it uses as much as digits as its factorization.

11227421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 224, while the sum is 20.

The square root of 11227421 is about 3350.7343971136. The cubic root of 11227421 is about 223.9202322800.

Adding to 11227421 its reverse (12472211), we get a palindrome (23699632).

The spelling of 11227421 in words is "eleven million, two hundred twenty-seven thousand, four hundred twenty-one".