21344311201 has 8 divisors (see below), whose sum is σ = 21699199208. Its totient is φ = 20989584000.

The previous prime is 21344311187. The next prime is 21344311217. The reversal of 21344311201 is 10211344312.

It can be written as a sum of positive squares in 4 ways, for example, as 2348856225 + 18995454976 = 48465^2 + 137824^2 .

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 21344311201 - 2¹⁹ = 21343786913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21344311501) 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, 244021 + ... + 319741.

It is an arithmetic number, because the mean of its divisors is an integer number (2712399901).

Almost surely, 2^21344311201 is an apocalyptic number.

It is an amenable number.

21344311201 is a deficient number, since it is larger than the sum of its proper divisors (354888007).

21344311201 is an equidigital number, since it uses as much as digits as its factorization.

21344311201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80403.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 21344311201 its reverse (10211344312), we get a palindrome (31555655513).

The spelling of 21344311201 in words is "twenty-one billion, three hundred forty-four million, three hundred eleven thousand, two hundred one".