21224414041 has 4 divisors (see below), whose sum is σ = 21302733184. Its totient is φ = 21146094900.

The previous prime is 21224414023. The next prime is 21224414077. The reversal of 21224414041 is 14041442212.

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 21224414041 - 2²³ = 21216025433 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21224413997 and 21224414015.

It is not an unprimeable number, because it can be changed into a prime (21224414011) 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, 39159165 + ... + 39159706.

It is an arithmetic number, because the mean of its divisors is an integer number (5325683296).

Almost surely, 2^21224414041 is an apocalyptic number.

It is an amenable number.

21224414041 is a deficient number, since it is larger than the sum of its proper divisors (78319143).

21224414041 is an equidigital number, since it uses as much as digits as its factorization.

21224414041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78319142.

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

Adding to 21224414041 its reverse (14041442212), we get a palindrome (35265856253).

The spelling of 21224414041 in words is "twenty-one billion, two hundred twenty-four million, four hundred fourteen thousand, forty-one".