21344201223 has 8 divisors (see below), whose sum is σ = 28505062128. Its totient is φ = 14206403904.

The previous prime is 21344201213. The next prime is 21344201269. The reversal of 21344201223 is 32210244312.

It is a happy number.

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

It is not a de Polignac number, because 21344201223 - 2⁵ = 21344201191 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21344201193 and 21344201202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21344201213) 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 7 ways as a sum of consecutive naturals, for example, 5763736 + ... + 5767437.

It is an arithmetic number, because the mean of its divisors is an integer number (3563132766).

Almost surely, 2^21344201223 is an apocalyptic number.

21344201223 is a deficient number, since it is larger than the sum of its proper divisors (7160860905).

21344201223 is a wasteful number, since it uses less digits than its factorization.

21344201223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11531793.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 21344201223 its reverse (32210244312), we get a palindrome (53554445535).

The spelling of 21344201223 in words is "twenty-one billion, three hundred forty-four million, two hundred one thousand, two hundred twenty-three".