21134334241 has 4 divisors (see below), whose sum is σ = 21134625300. Its totient is φ = 21134043184.

The previous prime is 21134334229. The next prime is 21134334259. The reversal of 21134334241 is 14243343112.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 2944147600 + 18190186641 = 54260^2 + 134871^2 .

It is a cyclic number.

It is not a de Polignac number, because 21134334241 - 2¹³ = 21134326049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21134334271) 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, 62775 + ... + 214963.

It is an arithmetic number, because the mean of its divisors is an integer number (5283656325).

Almost surely, 2^21134334241 is an apocalyptic number.

It is an amenable number.

21134334241 is a deficient number, since it is larger than the sum of its proper divisors (291059).

21134334241 is a wasteful number, since it uses less digits than its factorization.

21134334241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291058.

The product of its digits is 6912, while the sum is 28.

Adding to 21134334241 its reverse (14243343112), we get a palindrome (35377677353).

The spelling of 21134334241 in words is "twenty-one billion, one hundred thirty-four million, three hundred thirty-four thousand, two hundred forty-one".