1116203256521 has 2 divisors, whose sum is σ = 1116203256522. Its totient is φ = 1116203256520.

The previous prime is 1116203256463. The next prime is 1116203256551. The reversal of 1116203256521 is 1256523026111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1016394650896 + 99808605625 = 1008164^2 + 315925^2 .

It is a cyclic number.

It is not a de Polignac number, because 1116203256521 - 2³⁴ = 1099023387337 is a prime.

It is not a weakly prime, because it can be changed into another prime (1116203256551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 558101628260 + 558101628261.

It is an arithmetic number, because the mean of its divisors is an integer number (558101628261).

Almost surely, 2^{1116203256521} is an apocalyptic number.

It is an amenable number.

1116203256521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1116203256521 is an equidigital number, since it uses as much as digits as its factorization.

1116203256521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 35.

The spelling of 1116203256521 in words is "one trillion, one hundred sixteen billion, two hundred three million, two hundred fifty-six thousand, five hundred twenty-one".