201211022101111 has 16 divisors (see below), whose sum is σ = 220717331347968. Its totient is φ = 181907127885600.

The previous prime is 201211022101079. The next prime is 201211022101213. The reversal of 201211022101111 is 111101220112102.

It is a cyclic number.

It is not a de Polignac number, because 201211022101111 - 2⁵ = 201211022101079 is a prime.

It is a super-2 number, since 2×201211022101111² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201211022101511) 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, 336305550 + ... + 336903316.

It is an arithmetic number, because the mean of its divisors is an integer number (13794833209248).

Almost surely, 2^{201211022101111} is an apocalyptic number.

201211022101111 is a deficient number, since it is larger than the sum of its proper divisors (19506309246857).

201211022101111 is a wasteful number, since it uses less digits than its factorization.

201211022101111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 767022.

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

Adding to 201211022101111 its reverse (111101220112102), we get a palindrome (312312242213213).

The spelling of 201211022101111 in words is "two hundred one trillion, two hundred eleven billion, twenty-two million, one hundred one thousand, one hundred eleven".