211443134121 has 12 divisors (see below), whose sum is σ = 305434862772. Its totient is φ = 140954242176.

The previous prime is 211443134087. The next prime is 211443134129. The reversal of 211443134121 is 121431344112.

It is a happy number.

211443134121 is a `hidden beast` number, since 211 + 4 + 4 + 31 + 3 + 412 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 64879731225 + 146563402896 = 254715^2 + 382836^2 .

It is not a de Polignac number, because 211443134121 - 2⁹ = 211443133609 is a prime.

It is a super-2 number, since 2×211443134121² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211443134129) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 480876 + ... + 808781.

It is an arithmetic number, because the mean of its divisors is an integer number (25452905231).

Almost surely, 2^211443134121 is an apocalyptic number.

It is an amenable number.

211443134121 is a deficient number, since it is larger than the sum of its proper divisors (93991728651).

211443134121 is a wasteful number, since it uses less digits than its factorization.

211443134121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1307880 (or 1307877 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

Adding to 211443134121 its reverse (121431344112), we get a palindrome (332874478233).

The spelling of 211443134121 in words is "two hundred eleven billion, four hundred forty-three million, one hundred thirty-four thousand, one hundred twenty-one".