1218311041 has 2 divisors, whose sum is σ = 1218311042. Its totient is φ = 1218311040.

The previous prime is 1218311033. The next prime is 1218311071. The reversal of 1218311041 is 1401138121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 893770816 + 324540225 = 29896^2 + 18015^2 .

It is a cyclic number.

It is not a de Polignac number, because 1218311041 - 2³ = 1218311033 is a prime.

It is not a weakly prime, because it can be changed into another prime (1218311011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 609155520 + 609155521.

It is an arithmetic number, because the mean of its divisors is an integer number (609155521).

Almost surely, 2^1218311041 is an apocalyptic number.

It is an amenable number.

1218311041 is a deficient number, since it is larger than the sum of its proper divisors (1).

1218311041 is an equidigital number, since it uses as much as digits as its factorization.

1218311041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 22.

The square root of 1218311041 is about 34904.3126418499. The cubic root of 1218311041 is about 1068.0364142059.

Adding to 1218311041 its reverse (1401138121), we get a palindrome (2619449162).

The spelling of 1218311041 in words is "one billion, two hundred eighteen million, three hundred eleven thousand, forty-one".