1311101166149 has 2 divisors, whose sum is σ = 1311101166150. Its totient is φ = 1311101166148.

The previous prime is 1311101166139. The next prime is 1311101166173. The reversal of 1311101166149 is 9416611011131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1271948629249 + 39152536900 = 1127807^2 + 197870^2 .

It is a cyclic number.

It is not a de Polignac number, because 1311101166149 - 2²⁰ = 1311100117573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311101166139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655550583074 + 655550583075.

It is an arithmetic number, because the mean of its divisors is an integer number (655550583075).

Almost surely, 2^{1311101166149} is an apocalyptic number.

It is an amenable number.

1311101166149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311101166149 is an equidigital number, since it uses as much as digits as its factorization.

1311101166149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 35.

The spelling of 1311101166149 in words is "one trillion, three hundred eleven billion, one hundred one million, one hundred sixty-six thousand, one hundred forty-nine".