201121110211 has 4 divisors (see below), whose sum is σ = 229852697392. Its totient is φ = 172389523032.

The previous prime is 201121110199. The next prime is 201121110257. The reversal of 201121110211 is 112011121102.

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 201121110211 - 2²¹ = 201119013059 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201121110191 and 201121110200.

It is not an unprimeable number, because it can be changed into a prime (201121110811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14365793580 + ... + 14365793593.

It is an arithmetic number, because the mean of its divisors is an integer number (57463174348).

Almost surely, 2^201121110211 is an apocalyptic number.

201121110211 is a deficient number, since it is larger than the sum of its proper divisors (28731587181).

201121110211 is an equidigital number, since it uses as much as digits as its factorization.

201121110211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28731587180.

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

Adding to 201121110211 its reverse (112011121102), we get a palindrome (313132231313).

The spelling of 201121110211 in words is "two hundred one billion, one hundred twenty-one million, one hundred ten thousand, two hundred eleven".