21842201165 has 8 divisors (see below), whose sum is σ = 27590148960. Its totient is φ = 16554089232.

The previous prime is 21842201057. The next prime is 21842201219. The reversal of 21842201165 is 56110224812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21842201165 - 2¹⁰ = 21842200141 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 114958859 + ... + 114959048.

It is an arithmetic number, because the mean of its divisors is an integer number (3448768620).

Almost surely, 2^21842201165 is an apocalyptic number.

It is an amenable number.

21842201165 is a deficient number, since it is larger than the sum of its proper divisors (5747947795).

21842201165 is a wasteful number, since it uses less digits than its factorization.

21842201165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229917931.

The product of its (nonzero) digits is 7680, while the sum is 32.

Adding to 21842201165 its reverse (56110224812), we get a palindrome (77952425977).

The spelling of 21842201165 in words is "twenty-one billion, eight hundred forty-two million, two hundred one thousand, one hundred sixty-five".