211120201121 has 4 divisors (see below), whose sum is σ = 213210500244. Its totient is φ = 209029902000.

The previous prime is 211120201109. The next prime is 211120201151. The reversal of 211120201121 is 121102021112.

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

It can be written as a sum of positive squares in 2 ways, for example, as 205967114896 + 5153086225 = 453836^2 + 71785^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211120201121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211120201096 and 211120201105.

It is not an unprimeable number, because it can be changed into a prime (211120201151) 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, 1045149410 + ... + 1045149611.

It is an arithmetic number, because the mean of its divisors is an integer number (53302625061).

Almost surely, 2^211120201121 is an apocalyptic number.

It is an amenable number.

211120201121 is a deficient number, since it is larger than the sum of its proper divisors (2090299123).

211120201121 is a wasteful number, since it uses less digits than its factorization.

211120201121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2090299122.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 211120201121 its reverse (121102021112), we get a palindrome (332222222233).

The spelling of 211120201121 in words is "two hundred eleven billion, one hundred twenty million, two hundred one thousand, one hundred twenty-one".