1113331321 has 2 divisors, whose sum is σ = 1113331322. Its totient is φ = 1113331320.

The previous prime is 1113331319. The next prime is 1113331327. The reversal of 1113331321 is 1231333111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 611078400 + 502252921 = 24720^2 + 22411^2 .

It is an emirp because it is prime and its reverse (1231333111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1113331321 - 2¹ = 1113331319 is a prime.

Together with 1113331319, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1113331327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 556665660 + 556665661.

It is an arithmetic number, because the mean of its divisors is an integer number (556665661).

Almost surely, 2^1113331321 is an apocalyptic number.

It is an amenable number.

1113331321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1113331321 is an equidigital number, since it uses as much as digits as its factorization.

1113331321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 162, while the sum is 19.

The square root of 1113331321 is about 33366.6198617720. The cubic root of 1113331321 is about 1036.4335804970.

Adding to 1113331321 its reverse (1231333111), we get a palindrome (2344664432).

The spelling of 1113331321 in words is "one billion, one hundred thirteen million, three hundred thirty-one thousand, three hundred twenty-one".