201211122211 has 16 divisors (see below), whose sum is σ = 227891967840. Its totient is φ = 175973978880.

The previous prime is 201211122209. The next prime is 201211122221. The reversal of 201211122211 is 112221112102.

It is a cyclic number.

It is not a de Polignac number, because 201211122211 - 2¹ = 201211122209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201211122221) 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, 1050186 + ... + 1226911.

It is an arithmetic number, because the mean of its divisors is an integer number (14243247990).

Almost surely, 2^201211122211 is an apocalyptic number.

201211122211 is a deficient number, since it is larger than the sum of its proper divisors (26680845629).

201211122211 is a wasteful number, since it uses less digits than its factorization.

201211122211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2277414.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 201211122211 its reverse (112221112102), we get a palindrome (313432234313).

The spelling of 201211122211 in words is "two hundred one billion, two hundred eleven million, one hundred twenty-two thousand, two hundred eleven".