1011211011709 has 2 divisors, whose sum is σ = 1011211011710. Its totient is φ = 1011211011708.

The previous prime is 1011211011677. The next prime is 1011211011719. The reversal of 1011211011709 is 9071101121101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 769825495609 + 241385516100 = 877397^2 + 491310^2 .

It is an emirp because it is prime and its reverse (9071101121101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1011211011709 - 2⁵ = 1011211011677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1011211011719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505605505854 + 505605505855.

It is an arithmetic number, because the mean of its divisors is an integer number (505605505855).

Almost surely, 2^{1011211011709} is an apocalyptic number.

It is an amenable number.

1011211011709 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011211011709 is an equidigital number, since it uses as much as digits as its factorization.

1011211011709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 126, while the sum is 25.

The spelling of 1011211011709 in words is "one trillion, eleven billion, two hundred eleven million, eleven thousand, seven hundred nine".