1121313321217 has 4 divisors (see below), whose sum is σ = 1121326360020. Its totient is φ = 1121300282416.

The previous prime is 1121313321203. The next prime is 1121313321253. The reversal of 1121313321217 is 7121233131211.

It is a happy number.

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 137693687041 + 983619634176 = 371071^2 + 991776^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121313321217 - 2¹⁵ = 1121313288449 is a prime.

It is a super-2 number, since 2×1121313321217² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121313321017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6389542 + ... + 6562687.

It is an arithmetic number, because the mean of its divisors is an integer number (280331590005).

Almost surely, 2^{1121313321217} is an apocalyptic number.

It is an amenable number.

1121313321217 is a deficient number, since it is larger than the sum of its proper divisors (13038803).

1121313321217 is an equidigital number, since it uses as much as digits as its factorization.

1121313321217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13038802.

The product of its digits is 1512, while the sum is 28.

Adding to 1121313321217 its reverse (7121233131211), we get a palindrome (8242546452428).

The spelling of 1121313321217 in words is "one trillion, one hundred twenty-one billion, three hundred thirteen million, three hundred twenty-one thousand, two hundred seventeen".