1311103217 has 2 divisors, whose sum is σ = 1311103218. Its totient is φ = 1311103216.

The previous prime is 1311103187. The next prime is 1311103259. The reversal of 1311103217 is 7123011131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1300612096 + 10491121 = 36064^2 + 3239^2 .

It is a cyclic number.

It is not a de Polignac number, because 1311103217 - 2¹⁸ = 1310841073 is a prime.

It is not a weakly prime, because it can be changed into another prime (1311103267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655551608 + 655551609.

It is an arithmetic number, because the mean of its divisors is an integer number (655551609).

Almost surely, 2^1311103217 is an apocalyptic number.

It is an amenable number.

1311103217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311103217 is an equidigital number, since it uses as much as digits as its factorization.

1311103217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 126, while the sum is 20.

The square root of 1311103217 is about 36209.1592970618. The cubic root of 1311103217 is about 1094.4912510554.

Adding to 1311103217 its reverse (7123011131), we get a palindrome (8434114348).

The spelling of 1311103217 in words is "one billion, three hundred eleven million, one hundred three thousand, two hundred seventeen".