11224121 has 2 divisors, whose sum is σ = 11224122. Its totient is φ = 11224120.

The previous prime is 11224099. The next prime is 11224123. The reversal of 11224121 is 12142211.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9388096 + 1836025 = 3064^2 + 1355^2 .

It is a cyclic number.

It is not a de Polignac number, because 11224121 - 2¹⁰ = 11223097 is a prime.

It is a super-3 number, since 3×11224121³ (a number of 22 digits) contains 333 as substring.

It is a Sophie Germain prime.

Together with 11224123, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11224096 and 11224105.

It is not a weakly prime, because it can be changed into another prime (11224123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5612060 + 5612061.

It is an arithmetic number, because the mean of its divisors is an integer number (5612061).

Almost surely, 2^11224121 is an apocalyptic number.

It is an amenable number.

11224121 is a deficient number, since it is larger than the sum of its proper divisors (1).

11224121 is an equidigital number, since it uses as much as digits as its factorization.

11224121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32, while the sum is 14.

The square root of 11224121 is about 3350.2419315626. The cubic root of 11224121 is about 223.8982916766.

Adding to 11224121 its reverse (12142211), we get a palindrome (23366332).

The spelling of 11224121 in words is "eleven million, two hundred twenty-four thousand, one hundred twenty-one".