1218244069013 has 4 divisors (see below), whose sum is σ = 1218302690220. Its totient is φ = 1218185447808.

The previous prime is 1218244068997. The next prime is 1218244069027. The reversal of 1218244069013 is 3109604428121.

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 526389427729 + 691854641284 = 725527^2 + 831778^2 .

It is a cyclic number.

It is not a de Polignac number, because 1218244069013 - 2⁴ = 1218244068997 is a prime.

It is a super-2 number, since 2×1218244069013² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1218244069813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29279420 + ... + 29320997.

It is an arithmetic number, because the mean of its divisors is an integer number (304575672555).

Almost surely, 2^{1218244069013} is an apocalyptic number.

It is an amenable number.

1218244069013 is a deficient number, since it is larger than the sum of its proper divisors (58621207).

1218244069013 is an equidigital number, since it uses as much as digits as its factorization.

1218244069013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58621206.

The product of its (nonzero) digits is 82944, while the sum is 41.

The spelling of 1218244069013 in words is "one trillion, two hundred eighteen billion, two hundred forty-four million, sixty-nine thousand, thirteen".