200120001000209 has 4 divisors (see below), whose sum is σ = 202368540337380. Its totient is φ = 197871461663040.

The previous prime is 200120001000173. The next prime is 200120001000233. The reversal of 200120001000209 is 902000100021002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 121695161591809 + 78424839408400 = 11031553^2 + 8855780^2 .

It is a cyclic number.

It is not a de Polignac number, because 200120001000209 - 2⁸ = 200120000999953 is a prime.

It is a super-3 number, since 3×200120001000209³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (200120001000239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1124269668452 + ... + 1124269668629.

It is an arithmetic number, because the mean of its divisors is an integer number (50592135084345).

Almost surely, 2^{200120001000209} is an apocalyptic number.

It is an amenable number.

200120001000209 is a deficient number, since it is larger than the sum of its proper divisors (2248539337171).

200120001000209 is an equidigital number, since it uses as much as digits as its factorization.

200120001000209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2248539337170.

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

The spelling of 200120001000209 in words is "two hundred trillion, one hundred twenty billion, one million, two hundred nine", and thus it is an aban number.