1321223113 has 6 divisors (see below), whose sum is σ = 1536933066. Its totient is φ = 1132476912.

The previous prime is 1321223107. The next prime is 1321223143. The reversal of 1321223113 is 3113221231.

It can be written as a sum of positive squares in only one way, i.e., 1062238464 + 258984649 = 32592^2 + 16093^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1321223113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321223143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13481820 + ... + 13481917.

It is an arithmetic number, because the mean of its divisors is an integer number (256155511).

Almost surely, 2^1321223113 is an apocalyptic number.

It is an amenable number.

1321223113 is a deficient number, since it is larger than the sum of its proper divisors (215709953).

1321223113 is an equidigital number, since it uses as much as digits as its factorization.

1321223113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26963751 (or 26963744 counting only the distinct ones).

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

The square root of 1321223113 is about 36348.6328903853. The cubic root of 1321223113 is about 1097.3000209520.

Adding to 1321223113 its reverse (3113221231), we get a palindrome (4434444344).

The spelling of 1321223113 in words is "one billion, three hundred twenty-one million, two hundred twenty-three thousand, one hundred thirteen".