1001012101909 has 2 divisors, whose sum is σ = 1001012101910. Its totient is φ = 1001012101908.

The previous prime is 1001012101897. The next prime is 1001012101937. The reversal of 1001012101909 is 9091012101001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 974915314884 + 26096787025 = 987378^2 + 161545^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001012101909 - 2¹¹ = 1001012099861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001012101979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500506050954 + 500506050955.

It is an arithmetic number, because the mean of its divisors is an integer number (500506050955).

Almost surely, 2^{1001012101909} is an apocalyptic number.

It is an amenable number.

1001012101909 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001012101909 is an equidigital number, since it uses as much as digits as its factorization.

1001012101909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 25.

The spelling of 1001012101909 in words is "one trillion, one billion, twelve million, one hundred one thousand, nine hundred nine".