1104243221 has 2 divisors, whose sum is σ = 1104243222. Its totient is φ = 1104243220.

The previous prime is 1104243169. The next prime is 1104243223. The reversal of 1104243221 is 1223424011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 854919121 + 249324100 = 29239^2 + 15790^2 .

It is an emirp because it is prime and its reverse (1223424011) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1104243221 is a prime.

It is a super-2 number, since 2×1104243221² = 2438706182248909682, which contains 22 as substring.

Together with 1104243223, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1104243193 and 1104243202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1104243223) 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 as a sum of consecutive naturals, namely, 552121610 + 552121611.

It is an arithmetic number, because the mean of its divisors is an integer number (552121611).

Almost surely, 2^1104243221 is an apocalyptic number.

It is an amenable number.

1104243221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1104243221 is an equidigital number, since it uses as much as digits as its factorization.

1104243221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1104243221 is about 33230.1552960560. The cubic root of 1104243221 is about 1033.6057434999.

Adding to 1104243221 its reverse (1223424011), we get a palindrome (2327667232).

The spelling of 1104243221 in words is "one billion, one hundred four million, two hundred forty-three thousand, two hundred twenty-one".