1313218238791 has 2 divisors, whose sum is σ = 1313218238792. Its totient is φ = 1313218238790.

The previous prime is 1313218238779. The next prime is 1313218238797. The reversal of 1313218238791 is 1978328123131.

It is a strong prime.

It is an emirp because it is prime and its reverse (1978328123131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1313218238791 - 2²¹ = 1313216141639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1313218238797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656609119395 + 656609119396.

It is an arithmetic number, because the mean of its divisors is an integer number (656609119396).

Almost surely, 2^{1313218238791} is an apocalyptic number.

1313218238791 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313218238791 is an equidigital number, since it uses as much as digits as its factorization.

1313218238791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 49.

The spelling of 1313218238791 in words is "one trillion, three hundred thirteen billion, two hundred eighteen million, two hundred thirty-eight thousand, seven hundred ninety-one".