1123321321 has 4 divisors (see below), whose sum is σ = 1150719444. Its totient is φ = 1095923200.

The previous prime is 1123321319. The next prime is 1123321337. The reversal of 1123321321 is 1231233211.

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 253956096 + 869365225 = 15936^2 + 29485^2 .

It is a cyclic number.

It is not a de Polignac number, because 1123321321 - 2¹ = 1123321319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1123321391) 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, 13699000 + ... + 13699081.

It is an arithmetic number, because the mean of its divisors is an integer number (287679861).

Almost surely, 2^1123321321 is an apocalyptic number.

It is an amenable number.

1123321321 is a deficient number, since it is larger than the sum of its proper divisors (27398123).

1123321321 is an equidigital number, since it uses as much as digits as its factorization.

1123321321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27398122.

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

The square root of 1123321321 is about 33515.9860514352. The cubic root of 1123321321 is about 1039.5243513417.

Adding to 1123321321 its reverse (1231233211), we get a palindrome (2354554532).

The spelling of 1123321321 in words is "one billion, one hundred twenty-three million, three hundred twenty-one thousand, three hundred twenty-one".