1131318681791 has 2 divisors, whose sum is σ = 1131318681792. Its totient is φ = 1131318681790.

The previous prime is 1131318681781. The next prime is 1131318681799. The reversal of 1131318681791 is 1971868131311.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1131318681791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1131318681799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565659340895 + 565659340896.

It is an arithmetic number, because the mean of its divisors is an integer number (565659340896).

Almost surely, 2^{1131318681791} is an apocalyptic number.

1131318681791 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131318681791 is an equidigital number, since it uses as much as digits as its factorization.

1131318681791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 50.

The spelling of 1131318681791 in words is "one trillion, one hundred thirty-one billion, three hundred eighteen million, six hundred eighty-one thousand, seven hundred ninety-one".