201110121211 has 4 divisors (see below), whose sum is σ = 201131387424. Its totient is φ = 201088855000.

The previous prime is 201110121151. The next prime is 201110121253. The reversal of 201110121211 is 112121011102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 201110121211 - 2¹¹ = 201110119163 is a prime.

It is a super-2 number, since 2×201110121211² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201110121191 and 201110121200.

It is not an unprimeable number, because it can be changed into a prime (201113121211) 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 3 ways as a sum of consecutive naturals, for example, 10618915 + ... + 10637836.

It is an arithmetic number, because the mean of its divisors is an integer number (50282846856).

Almost surely, 2^201110121211 is an apocalyptic number.

201110121211 is a deficient number, since it is larger than the sum of its proper divisors (21266213).

201110121211 is an equidigital number, since it uses as much as digits as its factorization.

201110121211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21266212.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 201110121211 its reverse (112121011102), we get a palindrome (313231132313).

The spelling of 201110121211 in words is "two hundred one billion, one hundred ten million, one hundred twenty-one thousand, two hundred eleven".