1012219995817 has 2 divisors, whose sum is σ = 1012219995818. Its totient is φ = 1012219995816.

The previous prime is 1012219995797. The next prime is 1012219995841. The reversal of 1012219995817 is 7185999122101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 609228641961 + 402991353856 = 780531^2 + 634816^2 .

It is a cyclic number.

It is not a de Polignac number, because 1012219995817 - 2¹¹ = 1012219993769 is a prime.

It is not a weakly prime, because it can be changed into another prime (1012219995217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506109997908 + 506109997909.

It is an arithmetic number, because the mean of its divisors is an integer number (506109997909).

Almost surely, 2^{1012219995817} is an apocalyptic number.

It is an amenable number.

1012219995817 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012219995817 is an equidigital number, since it uses as much as digits as its factorization.

1012219995817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 816480, while the sum is 55.

The spelling of 1012219995817 in words is "one trillion, twelve billion, two hundred nineteen million, nine hundred ninety-five thousand, eight hundred seventeen".