11221123 has 2 divisors, whose sum is σ = 11221124.
Its totient is φ = 11221122.
The previous prime is 11221103. The next prime is 11221127. The reversal of 11221123 is 32112211.
Adding to 11221123 its reverse (32112211), we get a palindrome (43333334).
It is a strong prime.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-11221123 is a prime.
It is a super-2 number, since 2×112211232 = 251827202762258, which contains 22 as substring.
It is not a weakly prime, because it can be changed into another prime (11221127) 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, 5610561 + 5610562.
It is an arithmetic number, because the mean of its divisors is an integer number (5610562).
Almost surely, 211221123 is an apocalyptic number.
11221123 is a deficient number, since it is larger than the sum of its proper divisors (1).
11221123 is an equidigital number, since it uses as much as digits as its factorization.
11221123 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 24, while the sum is 13.
The square root of 11221123 is about 3349.7944713072.
The cubic root of 11221123 is about 223.8783552423.
The spelling of 11221123 in words is "eleven million, two hundred twenty-one thousand, one hundred twenty-three".