211411243121 has 4 divisors (see below), whose sum is σ = 227673646452. Its totient is φ = 195148839792.

The previous prime is 211411243079. The next prime is 211411243139. The reversal of 211411243121 is 121342114112.

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 62218318096 + 149192925025 = 249436^2 + 386255^2 .

It is a cyclic number.

It is not a de Polignac number, because 211411243121 - 2²⁶ = 211344134257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211411243181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8131201646 + ... + 8131201671.

It is an arithmetic number, because the mean of its divisors is an integer number (56918411613).

Almost surely, 2^211411243121 is an apocalyptic number.

It is an amenable number.

211411243121 is a deficient number, since it is larger than the sum of its proper divisors (16262403331).

211411243121 is a wasteful number, since it uses less digits than its factorization.

211411243121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16262403330.

The product of its digits is 384, while the sum is 23.

Adding to 211411243121 its reverse (121342114112), we get a palindrome (332753357233).

The spelling of 211411243121 in words is "two hundred eleven billion, four hundred eleven million, two hundred forty-three thousand, one hundred twenty-one".