201211020221111 has 16 divisors (see below), whose sum is σ = 204094908341280. Its totient is φ = 198346074433920.

The previous prime is 201211020221083. The next prime is 201211020221117. The reversal of 201211020221111 is 111122020112102.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201211020221111 is a prime.

It is a super-4 number, since 4×201211020221111⁴ (a number of 58 digits) contains 4444 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201211020221111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201211020221117) 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 15 ways as a sum of consecutive naturals, for example, 675756776 + ... + 676054466.

It is an arithmetic number, because the mean of its divisors is an integer number (12755931771330).

Almost surely, 2^{201211020221111} is an apocalyptic number.

201211020221111 is a deficient number, since it is larger than the sum of its proper divisors (2883888120169).

201211020221111 is a wasteful number, since it uses less digits than its factorization.

201211020221111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329474.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 201211020221111 its reverse (111122020112102), we get a palindrome (312333040333213).

The spelling of 201211020221111 in words is "two hundred one trillion, two hundred eleven billion, twenty million, two hundred twenty-one thousand, one hundred eleven".