1200020210209 has 2 divisors, whose sum is σ = 1200020210210. Its totient is φ = 1200020210208.

The previous prime is 1200020210183. The next prime is 1200020210231. The reversal of 1200020210209 is 9020120200021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 783862329600 + 416157880609 = 885360^2 + 645103^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200020210209 - 2³³ = 1191430275617 is a prime.

It is not a weakly prime, because it can be changed into another prime (1200020210239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600010105104 + 600010105105.

It is an arithmetic number, because the mean of its divisors is an integer number (600010105105).

Almost surely, 2^{1200020210209} is an apocalyptic number.

It is an amenable number.

1200020210209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200020210209 is an equidigital number, since it uses as much as digits as its factorization.

1200020210209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

The spelling of 1200020210209 in words is "one trillion, two hundred billion, twenty million, two hundred ten thousand, two hundred nine".