1311123313 has 2 divisors, whose sum is σ = 1311123314. Its totient is φ = 1311123312.

The previous prime is 1311123301. The next prime is 1311123343. The reversal of 1311123313 is 3133211131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1136566369 + 174556944 = 33713^2 + 13212^2 .

It is a cyclic number.

It is not a de Polignac number, because 1311123313 - 2²¹ = 1309026161 is a prime.

It is not a weakly prime, because it can be changed into another prime (1311123343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655561656 + 655561657.

It is an arithmetic number, because the mean of its divisors is an integer number (655561657).

Almost surely, 2^1311123313 is an apocalyptic number.

It is an amenable number.

1311123313 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311123313 is an equidigital number, since it uses as much as digits as its factorization.

1311123313 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1311123313 is about 36209.4367948467. The cubic root of 1311123313 is about 1094.4968429832.

Adding to 1311123313 its reverse (3133211131), we get a palindrome (4444334444).

The spelling of 1311123313 in words is "one billion, three hundred eleven million, one hundred twenty-three thousand, three hundred thirteen".