1218139607203 has 2 divisors, whose sum is σ = 1218139607204. Its totient is φ = 1218139607202.

The previous prime is 1218139607173. The next prime is 1218139607261. The reversal of 1218139607203 is 3027069318121.

It is a weak prime.

It is an emirp because it is prime and its reverse (3027069318121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1218139607203 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1218139607203.

It is not a weakly prime, because it can be changed into another prime (1218139607303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 609069803601 + 609069803602.

It is an arithmetic number, because the mean of its divisors is an integer number (609069803602).

Almost surely, 2^{1218139607203} is an apocalyptic number.

1218139607203 is a deficient number, since it is larger than the sum of its proper divisors (1).

1218139607203 is an equidigital number, since it uses as much as digits as its factorization.

1218139607203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 43.

The spelling of 1218139607203 in words is "one trillion, two hundred eighteen billion, one hundred thirty-nine million, six hundred seven thousand, two hundred three".