1113320321 has 4 divisors (see below), whose sum is σ = 1119471444. Its totient is φ = 1107169200.

The previous prime is 1113320311. The next prime is 1113320323. The reversal of 1113320321 is 1230233111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1230233111 = 33767 ⋅36433.

It can be written as a sum of positive squares in 2 ways, for example, as 168065296 + 945255025 = 12964^2 + 30745^2 .

It is a cyclic number.

It is not a de Polignac number, because 1113320321 - 2²² = 1109126017 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 1113320321.

It is not an unprimeable number, because it can be changed into a prime (1113320323) 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, 3075290 + ... + 3075651.

It is an arithmetic number, because the mean of its divisors is an integer number (279867861).

Almost surely, 2^1113320321 is an apocalyptic number.

It is an amenable number.

1113320321 is a deficient number, since it is larger than the sum of its proper divisors (6151123).

1113320321 is an equidigital number, since it uses as much as digits as its factorization.

1113320321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6151122.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1113320321 is about 33366.4550259688. The cubic root of 1113320321 is about 1036.4301670755.

Adding to 1113320321 its reverse (1230233111), we get a palindrome (2343553432).

The spelling of 1113320321 in words is "one billion, one hundred thirteen million, three hundred twenty thousand, three hundred twenty-one".