1011211194817 has 2 divisors, whose sum is σ = 1011211194818. Its totient is φ = 1011211194816.

The previous prime is 1011211194811. The next prime is 1011211194821. The reversal of 1011211194817 is 7184911121101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 656041681296 + 355169513521 = 809964^2 + 595961^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1011211194817 is a prime.

It is not a weakly prime, because it can be changed into another prime (1011211194811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505605597408 + 505605597409.

It is an arithmetic number, because the mean of its divisors is an integer number (505605597409).

Almost surely, 2^{1011211194817} is an apocalyptic number.

It is an amenable number.

1011211194817 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011211194817 is an equidigital number, since it uses as much as digits as its factorization.

1011211194817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 37.

The spelling of 1011211194817 in words is "one trillion, eleven billion, two hundred eleven million, one hundred ninety-four thousand, eight hundred seventeen".