21344323201 has 4 divisors (see below), whose sum is σ = 21346502400. Its totient is φ = 21342144004.

The previous prime is 21344323181. The next prime is 21344323207. The reversal of 21344323201 is 10232344312.

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 21344323201 - 2⁷ = 21344323073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21344323207) 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, 1074841 + ... + 1094518.

It is an arithmetic number, because the mean of its divisors is an integer number (5336625600).

Almost surely, 2^21344323201 is an apocalyptic number.

It is an amenable number.

21344323201 is a deficient number, since it is larger than the sum of its proper divisors (2179199).

21344323201 is an equidigital number, since it uses as much as digits as its factorization.

21344323201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2179198.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 21344323201 its reverse (10232344312), we get a palindrome (31576667513).

The spelling of 21344323201 in words is "twenty-one billion, three hundred forty-four million, three hundred twenty-three thousand, two hundred one".