1123320321 has 12 divisors (see below), whose sum is σ = 1624067172. Its totient is φ = 748190976.

The previous prime is 1123320287. The next prime is 1123320329. The reversal of 1123320321 is 1230233211.

1123320321 is a `hidden beast` number, since 1 + 1 + 23 + 320 + 321 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 92910321 + 1030410000 = 9639^2 + 32100^2 .

It is not a de Polignac number, because 1123320321 - 2⁷ = 1123320193 is a prime.

It is a super-3 number, since 3×1123320321³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1123320294 and 1123320303.

It is not an unprimeable number, because it can be changed into a prime (1123320329) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47016 + ... + 66761.

It is an arithmetic number, because the mean of its divisors is an integer number (135338931).

Almost surely, 2^1123320321 is an apocalyptic number.

It is an amenable number.

1123320321 is a deficient number, since it is larger than the sum of its proper divisors (500746851).

1123320321 is a wasteful number, since it uses less digits than its factorization.

1123320321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114880 (or 114877 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1123320321 is about 33515.9711331777. The cubic root of 1123320321 is about 1039.5240428741.

Adding to 1123320321 its reverse (1230233211), we get a palindrome (2353553532).

The spelling of 1123320321 in words is "one billion, one hundred twenty-three million, three hundred twenty thousand, three hundred twenty-one".