1000020101209 has 2 divisors, whose sum is σ = 1000020101210. Its totient is φ = 1000020101208.

The previous prime is 1000020101191. The next prime is 1000020101231. The reversal of 1000020101209 is 9021010200001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 667575604809 + 332444496400 = 817053^2 + 576580^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000020101209 - 2⁵ = 1000020101177 is a prime.

It is a super-3 number, since 3×1000020101209³ (a number of 37 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1000020101192 and 1000020101201.

It is not a weakly prime, because it can be changed into another prime (1000020101009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500010050604 + 500010050605.

It is an arithmetic number, because the mean of its divisors is an integer number (500010050605).

Almost surely, 2^{1000020101209} is an apocalyptic number.

It is an amenable number.

1000020101209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000020101209 is an equidigital number, since it uses as much as digits as its factorization.

1000020101209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 16.

The spelling of 1000020101209 in words is "one trillion, twenty million, one hundred one thousand, two hundred nine".