21242231341 has 4 divisors (see below), whose sum is σ = 21243356512. Its totient is φ = 21241106172.

The previous prime is 21242231293. The next prime is 21242231369. The reversal of 21242231341 is 14313224212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21242231341 - 2³³ = 12652296749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21242231441) 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, 533775 + ... + 572188.

It is an arithmetic number, because the mean of its divisors is an integer number (5310839128).

Almost surely, 2^21242231341 is an apocalyptic number.

It is an amenable number.

21242231341 is a deficient number, since it is larger than the sum of its proper divisors (1125171).

21242231341 is a wasteful number, since it uses less digits than its factorization.

21242231341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1125170.

The product of its digits is 2304, while the sum is 25.

Adding to 21242231341 its reverse (14313224212), we get a palindrome (35555455553).

The spelling of 21242231341 in words is "twenty-one billion, two hundred forty-two million, two hundred thirty-one thousand, three hundred forty-one".