1105323221 has 4 divisors (see below), whose sum is σ = 1170342252. Its totient is φ = 1040304192.

The previous prime is 1105323211. The next prime is 1105323239. The reversal of 1105323221 is 1223235011.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 312900721 + 792422500 = 17689^2 + 28150^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1105323221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1105323193 and 1105323202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1105323211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32509490 + ... + 32509523.

It is an arithmetic number, because the mean of its divisors is an integer number (292585563).

Almost surely, 2^1105323221 is an apocalyptic number.

It is an amenable number.

1105323221 is a deficient number, since it is larger than the sum of its proper divisors (65019031).

1105323221 is an equidigital number, since it uses as much as digits as its factorization.

1105323221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65019030.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 1105323221 is about 33246.4016248375. The cubic root of 1105323221 is about 1033.9426048152.

Adding to 1105323221 its reverse (1223235011), we get a palindrome (2328558232).

The spelling of 1105323221 in words is "one billion, one hundred five million, three hundred twenty-three thousand, two hundred twenty-one".