1218313734041 has 4 divisors (see below), whose sum is σ = 1218316187172. Its totient is φ = 1218311280912.

The previous prime is 1218313734037. The next prime is 1218313734049. The reversal of 1218313734041 is 1404373138121.

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 574532164441 + 643781569600 = 757979^2 + 802360^2 .

It is a cyclic number.

It is not a de Polignac number, because 1218313734041 - 2² = 1218313734037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1218313733986 and 1218313734004.

It is not an unprimeable number, because it can be changed into a prime (1218313734049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189110 + ... + 1572383.

It is an arithmetic number, because the mean of its divisors is an integer number (304579046793).

Almost surely, 2^{1218313734041} is an apocalyptic number.

It is an amenable number.

1218313734041 is a deficient number, since it is larger than the sum of its proper divisors (2453131).

1218313734041 is an equidigital number, since it uses as much as digits as its factorization.

1218313734041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2453130.

The product of its (nonzero) digits is 48384, while the sum is 38.

The spelling of 1218313734041 in words is "one trillion, two hundred eighteen billion, three hundred thirteen million, seven hundred thirty-four thousand, forty-one".