100668403743521 has 2 divisors, whose sum is σ = 100668403743522. Its totient is φ = 100668403743520.

The previous prime is 100668403743379. The next prime is 100668403743553. The reversal of 100668403743521 is 125347304866001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62434413387025 + 38233990356496 = 7901545^2 + 6183364^2 .

It is a cyclic number.

It is not a de Polignac number, because 100668403743521 - 2²² = 100668399549217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 100668403743521.

It is not a weakly prime, because it can be changed into another prime (100668403742521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50334201871760 + 50334201871761.

It is an arithmetic number, because the mean of its divisors is an integer number (50334201871761).

Almost surely, 2^{100668403743521} is an apocalyptic number.

It is an amenable number.

100668403743521 is a deficient number, since it is larger than the sum of its proper divisors (1).

100668403743521 is an equidigital number, since it uses as much as digits as its factorization.

100668403743521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2903040, while the sum is 50.

The spelling of 100668403743521 in words is "one hundred trillion, six hundred sixty-eight billion, four hundred three million, seven hundred forty-three thousand, five hundred twenty-one".