1123203221 has 8 divisors (see below), whose sum is σ = 1351222080. Its totient is φ = 912074688.

The previous prime is 1123203217. The next prime is 1123203223. The reversal of 1123203221 is 1223023211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1123203221 - 2² = 1123203217 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1123203221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123203223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4222436 + ... + 4222701.

It is an arithmetic number, because the mean of its divisors is an integer number (168902760).

Almost surely, 2^1123203221 is an apocalyptic number.

It is an amenable number.

1123203221 is a deficient number, since it is larger than the sum of its proper divisors (228018859).

1123203221 is an equidigital number, since it uses as much as digits as its factorization.

1123203221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8445163.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1123203221 is about 33514.2241593029. The cubic root of 1123203221 is about 1039.4879200535.

Adding to 1123203221 its reverse (1223023211), we get a palindrome (2346226432).

The spelling of 1123203221 in words is "one billion, one hundred twenty-three million, two hundred three thousand, two hundred twenty-one".