1317618121 has 2 divisors, whose sum is σ = 1317618122. Its totient is φ = 1317618120.

The previous prime is 1317618119. The next prime is 1317618131. The reversal of 1317618121 is 1218167131.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1265936400 + 51681721 = 35580^2 + 7189^2 .

It is a cyclic number.

It is not a de Polignac number, because 1317618121 - 2¹ = 1317618119 is a prime.

It is a super-2 number, since 2×1317618121² = 3472235025575141282, which contains 22 as substring.

Together with 1317618119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1317618101) 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 as a sum of consecutive naturals, namely, 658809060 + 658809061.

It is an arithmetic number, because the mean of its divisors is an integer number (658809061).

Almost surely, 2^1317618121 is an apocalyptic number.

It is an amenable number.

1317618121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1317618121 is an equidigital number, since it uses as much as digits as its factorization.

1317618121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 31.

The square root of 1317618121 is about 36299.0099176272. The cubic root of 1317618121 is about 1096.3011078948.

The spelling of 1317618121 in words is "one billion, three hundred seventeen million, six hundred eighteen thousand, one hundred twenty-one".