21344220001 has 8 divisors (see below), whose sum is σ = 24338205864. Its totient is φ = 18543394560.

The previous prime is 21344219959. The next prime is 21344220017. The reversal of 21344220001 is 10002244312.

It can be written as a sum of positive squares in 4 ways, for example, as 333427600 + 21010792401 = 18260^2 + 144951^2 .

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 21344220001 - 2⁷ = 21344219873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21344220061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48289870 + ... + 48290311.

It is an arithmetic number, because the mean of its divisors is an integer number (3042275733).

Almost surely, 2^21344220001 is an apocalyptic number.

It is an amenable number.

21344220001 is a deficient number, since it is larger than the sum of its proper divisors (2993985863).

21344220001 is a wasteful number, since it uses less digits than its factorization.

21344220001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96580211.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 21344220001 its reverse (10002244312), we get a palindrome (31346464313).

The spelling of 21344220001 in words is "twenty-one billion, three hundred forty-four million, two hundred twenty thousand, one".