201111221211 has 8 divisors (see below), whose sum is σ = 268150446144. Its totient is φ = 134073071880.

The previous prime is 201111221209. The next prime is 201111221237. The reversal of 201111221211 is 112122111102.

It is a happy number.

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

It is not a de Polignac number, because 201111221211 - 2¹ = 201111221209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201111228211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 418176 + ... + 759666.

It is an arithmetic number, because the mean of its divisors is an integer number (33518805768).

Almost surely, 2^201111221211 is an apocalyptic number.

201111221211 is a deficient number, since it is larger than the sum of its proper divisors (67039224933).

201111221211 is a wasteful number, since it uses less digits than its factorization.

201111221211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537801.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 201111221211 its reverse (112122111102), we get a palindrome (313233332313).

The spelling of 201111221211 in words is "two hundred one billion, one hundred eleven million, two hundred twenty-one thousand, two hundred eleven".