1210001110009 has 2 divisors, whose sum is σ = 1210001110010. Its totient is φ = 1210001110008.

The previous prime is 1210001110007. The next prime is 1210001110033. The reversal of 1210001110009 is 9000111000121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1113084080784 + 96917029225 = 1055028^2 + 311315^2 .

It is an emirp because it is prime and its reverse (9000111000121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1210001110009 - 2¹ = 1210001110007 is a prime.

Together with 1210001110007, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1210001109974 and 1210001110001.

It is not a weakly prime, because it can be changed into another prime (1210001110007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605000555004 + 605000555005.

It is an arithmetic number, because the mean of its divisors is an integer number (605000555005).

Almost surely, 2^{1210001110009} is an apocalyptic number.

It is an amenable number.

1210001110009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210001110009 is an equidigital number, since it uses as much as digits as its factorization.

1210001110009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 16.

The spelling of 1210001110009 in words is "one trillion, two hundred ten billion, one million, one hundred ten thousand, nine".