1123331221 has 8 divisors (see below), whose sum is σ = 1159999488. Its totient is φ = 1086690000.

The previous prime is 1123331207. The next prime is 1123331273. The reversal of 1123331221 is 1221333211.

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

It is a cyclic number.

It is not a de Polignac number, because 1123331221 - 2⁵ = 1123331189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123311221) 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, 109836 + ... + 119626.

It is an arithmetic number, because the mean of its divisors is an integer number (144999936).

Almost surely, 2^1123331221 is an apocalyptic number.

It is an amenable number.

1123331221 is a deficient number, since it is larger than the sum of its proper divisors (36668267).

1123331221 is an equidigital number, since it uses as much as digits as its factorization.

1123331221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13523.

The product of its digits is 216, while the sum is 19.

The square root of 1123331221 is about 33516.1337418265. The cubic root of 1123331221 is about 1039.5274051610.

Adding to 1123331221 its reverse (1221333211), we get a palindrome (2344664432).

It can be divided in two parts, 112 and 3331221, that added together give a palindrome (3331333).

The spelling of 1123331221 in words is "one billion, one hundred twenty-three million, three hundred thirty-one thousand, two hundred twenty-one".