1012020000209 has 2 divisors, whose sum is σ = 1012020000210. Its totient is φ = 1012020000208.

The previous prime is 1012020000151. The next prime is 1012020000221. The reversal of 1012020000209 is 9020000202101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 811251483025 + 200768517184 = 900695^2 + 448072^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1012020000209 is a prime.

It is not a weakly prime, because it can be changed into another prime (1012020000109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506010000104 + 506010000105.

It is an arithmetic number, because the mean of its divisors is an integer number (506010000105).

Almost surely, 2^{1012020000209} is an apocalyptic number.

It is an amenable number.

1012020000209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012020000209 is an equidigital number, since it uses as much as digits as its factorization.

1012020000209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

The spelling of 1012020000209 in words is "one trillion, twelve billion, twenty million, two hundred nine", and thus it is an aban number.