21202104041 has 4 divisors (see below), whose sum is σ = 21695176272. Its totient is φ = 20709031812.

The previous prime is 21202104037. The next prime is 21202104067. The reversal of 21202104041 is 14040120212.

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 21202104041 - 2² = 21202104037 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21202104031) 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, 246536051 + ... + 246536136.

It is an arithmetic number, because the mean of its divisors is an integer number (5423794068).

Almost surely, 2^21202104041 is an apocalyptic number.

It is an amenable number.

21202104041 is a deficient number, since it is larger than the sum of its proper divisors (493072231).

21202104041 is an equidigital number, since it uses as much as digits as its factorization.

21202104041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493072230.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21202104041 its reverse (14040120212), we get a palindrome (35242224253).

The spelling of 21202104041 in words is "twenty-one billion, two hundred two million, one hundred four thousand, forty-one".