201211122218 has 8 divisors (see below), whose sum is σ = 302048675460. Its totient is φ = 100528230400.

The previous prime is 201211122209. The next prime is 201211122221. The reversal of 201211122218 is 812221112102.

It can be written as a sum of positive squares in 2 ways, for example, as 142282103209 + 58929019009 = 377203^2 + 242753^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 201211122193 and 201211122202.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38662103 + ... + 38667306.

Almost surely, 2^201211122218 is an apocalyptic number.

201211122218 is a deficient number, since it is larger than the sum of its proper divisors (100837553242).

201211122218 is a wasteful number, since it uses less digits than its factorization.

201211122218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77330712.

The product of its (nonzero) digits is 256, while the sum is 23.

The spelling of 201211122218 in words is "two hundred one billion, two hundred eleven million, one hundred twenty-two thousand, two hundred eighteen".