1020111001817 has 2 divisors, whose sum is σ = 1020111001818. Its totient is φ = 1020111001816.

The previous prime is 1020111001807. The next prime is 1020111001883. The reversal of 1020111001817 is 7181001110201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 817380536281 + 202730465536 = 904091^2 + 450256^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020111001817 - 2⁸ = 1020111001561 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1020111001792 and 1020111001801.

It is not a weakly prime, because it can be changed into another prime (1020111001807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510055500908 + 510055500909.

It is an arithmetic number, because the mean of its divisors is an integer number (510055500909).

Almost surely, 2^{1020111001817} is an apocalyptic number.

It is an amenable number.

1020111001817 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020111001817 is an equidigital number, since it uses as much as digits as its factorization.

1020111001817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112, while the sum is 23.

The spelling of 1020111001817 in words is "one trillion, twenty billion, one hundred eleven million, one thousand, eight hundred seventeen".