21312424041 has 4 divisors (see below), whose sum is σ = 28416565392. Its totient is φ = 14208282692.

The previous prime is 21312424033. The next prime is 21312424103. The reversal of 21312424041 is 14042421312.

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 21312424041 - 2³ = 21312424033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21312424541) 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, 3552070671 + ... + 3552070676.

It is an arithmetic number, because the mean of its divisors is an integer number (7104141348).

Almost surely, 2^21312424041 is an apocalyptic number.

It is an amenable number.

21312424041 is a deficient number, since it is larger than the sum of its proper divisors (7104141351).

21312424041 is an equidigital number, since it uses as much as digits as its factorization.

21312424041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7104141350.

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 21312424041 its reverse (14042421312), we get a palindrome (35354845353).

The spelling of 21312424041 in words is "twenty-one billion, three hundred twelve million, four hundred twenty-four thousand, forty-one".