21842201171 has 16 divisors (see below), whose sum is σ = 26440680960. Its totient is φ = 17614078080.

The previous prime is 21842201057. The next prime is 21842201219. The reversal of 21842201171 is 17110224812.

It is not a de Polignac number, because 21842201171 - 2¹⁸ = 21841939027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21842204171) 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 15 ways as a sum of consecutive naturals, for example, 302906 + ... + 368016.

It is an arithmetic number, because the mean of its divisors is an integer number (1652542560).

Almost surely, 2^21842201171 is an apocalyptic number.

21842201171 is a deficient number, since it is larger than the sum of its proper divisors (4598479789).

21842201171 is a wasteful number, since it uses less digits than its factorization.

21842201171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67954.

The product of its (nonzero) digits is 1792, while the sum is 29.

Adding to 21842201171 its reverse (17110224812), we get a palindrome (38952425983).

The spelling of 21842201171 in words is "twenty-one billion, eight hundred forty-two million, two hundred one thousand, one hundred seventy-one".