1242166533313 has 2 divisors, whose sum is σ = 1242166533314. Its totient is φ = 1242166533312.

The previous prime is 1242166533299. The next prime is 1242166533329. The reversal of 1242166533313 is 3133356612421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 862238530624 + 379928002689 = 928568^2 + 616383^2 .

It is a cyclic number.

It is not a de Polignac number, because 1242166533313 - 2⁹ = 1242166532801 is a prime.

It is not a weakly prime, because it can be changed into another prime (1242166543313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621083266656 + 621083266657.

It is an arithmetic number, because the mean of its divisors is an integer number (621083266657).

Almost surely, 2^{1242166533313} is an apocalyptic number.

It is an amenable number.

1242166533313 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242166533313 is an equidigital number, since it uses as much as digits as its factorization.

1242166533313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 233280, while the sum is 40.

The spelling of 1242166533313 in words is "one trillion, two hundred forty-two billion, one hundred sixty-six million, five hundred thirty-three thousand, three hundred thirteen".