1231268886671 has 2 divisors, whose sum is σ = 1231268886672. Its totient is φ = 1231268886670.

The previous prime is 1231268886623. The next prime is 1231268886689. The reversal of 1231268886671 is 1766888621321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1231268886671 - 2¹⁰ = 1231268885647 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1231268886671.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1231268880671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615634443335 + 615634443336.

It is an arithmetic number, because the mean of its divisors is an integer number (615634443336).

Almost surely, 2^{1231268886671} is an apocalyptic number.

1231268886671 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231268886671 is an equidigital number, since it uses as much as digits as its factorization.

1231268886671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9289728, while the sum is 59.

The spelling of 1231268886671 in words is "one trillion, two hundred thirty-one billion, two hundred sixty-eight million, eight hundred eighty-six thousand, six hundred seventy-one".