1231340104549 has 2 divisors, whose sum is σ = 1231340104550. Its totient is φ = 1231340104548.

The previous prime is 1231340104507. The next prime is 1231340104559. The reversal of 1231340104549 is 9454010431321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 629562902500 + 601777202049 = 793450^2 + 775743^2 .

It is a cyclic number.

It is not a de Polignac number, because 1231340104549 - 2²³ = 1231331715941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1231340104559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615670052274 + 615670052275.

It is an arithmetic number, because the mean of its divisors is an integer number (615670052275).

Almost surely, 2^{1231340104549} is an apocalyptic number.

It is an amenable number.

1231340104549 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231340104549 is an equidigital number, since it uses as much as digits as its factorization.

1231340104549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 37.

The spelling of 1231340104549 in words is "one trillion, two hundred thirty-one billion, three hundred forty million, one hundred four thousand, five hundred forty-nine".