2851201040209 has 4 divisors (see below), whose sum is σ = 2851261988004. Its totient is φ = 2851140092416.

The previous prime is 2851201040189. The next prime is 2851201040243. The reversal of 2851201040209 is 9020401021582.

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 2480042284225 + 371158755984 = 1574815^2 + 609228^2 .

It is a cyclic number.

It is not a de Polignac number, because 2851201040209 - 2¹⁵ = 2851201007441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2851201040249) 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, 30403672 + ... + 30497305.

It is an arithmetic number, because the mean of its divisors is an integer number (712815497001).

Almost surely, 2^{2851201040209} is an apocalyptic number.

It is an amenable number.

2851201040209 is a deficient number, since it is larger than the sum of its proper divisors (60947795).

2851201040209 is an equidigital number, since it uses as much as digits as its factorization.

2851201040209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60947794.

The product of its (nonzero) digits is 11520, while the sum is 34.

The spelling of 2851201040209 in words is "two trillion, eight hundred fifty-one billion, two hundred one million, forty thousand, two hundred nine".