1311000009997 has 2 divisors, whose sum is σ = 1311000009998. Its totient is φ = 1311000009996.

The previous prime is 1311000009961. The next prime is 1311000010003. The reversal of 1311000009997 is 7999000001131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1149282626116 + 161717383881 = 1072046^2 + 402141^2 .

It is a cyclic number.

It is not a de Polignac number, because 1311000009997 - 2³⁵ = 1276640271629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311000003997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655500004998 + 655500004999.

It is an arithmetic number, because the mean of its divisors is an integer number (655500004999).

Almost surely, 2^{1311000009997} is an apocalyptic number.

It is an amenable number.

1311000009997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311000009997 is an equidigital number, since it uses as much as digits as its factorization.

1311000009997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15309, while the sum is 40.

The spelling of 1311000009997 in words is "one trillion, three hundred eleven billion, nine thousand, nine hundred ninety-seven".