21214424041 has 4 divisors (see below), whose sum is σ = 21217185792. Its totient is φ = 21211662292.

The previous prime is 21214424039. The next prime is 21214424069. The reversal of 21214424041 is 14042441212.

It is a happy number.

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 21214424041 - 2¹ = 21214424039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21214423997 and 21214424015.

It is not an unprimeable number, because it can be changed into a prime (21214424071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1369321 + ... + 1384726.

It is an arithmetic number, because the mean of its divisors is an integer number (5304296448).

Almost surely, 2^21214424041 is an apocalyptic number.

It is an amenable number.

21214424041 is a deficient number, since it is larger than the sum of its proper divisors (2761751).

21214424041 is an equidigital number, since it uses as much as digits as its factorization.

21214424041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2761750.

The product of its (nonzero) digits is 2048, while the sum is 25.

Adding to 21214424041 its reverse (14042441212), we get a palindrome (35256865253).

The spelling of 21214424041 in words is "twenty-one billion, two hundred fourteen million, four hundred twenty-four thousand, forty-one".