211200020209 has 16 divisors (see below), whose sum is σ = 213846491664. Its totient is φ = 208565280000.

The previous prime is 211200020201. The next prime is 211200020221. The reversal of 211200020209 is 902020002112.

It can be written as a sum of positive squares in 8 ways, for example, as 112428101809 + 98771918400 = 335303^2 + 314280^2 .

It is a cyclic number.

It is not a de Polignac number, because 211200020209 - 2³ = 211200020201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211200020201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102872827 + ... + 102874879.

It is an arithmetic number, because the mean of its divisors is an integer number (13365405729).

Almost surely, 2^211200020209 is an apocalyptic number.

It is an amenable number.

211200020209 is a deficient number, since it is larger than the sum of its proper divisors (2646471455).

211200020209 is a wasteful number, since it uses less digits than its factorization.

211200020209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4308.

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

The spelling of 211200020209 in words is "two hundred eleven billion, two hundred million, twenty thousand, two hundred nine".