21313044011 has 8 divisors (see below), whose sum is σ = 24691433184. Its totient is φ = 18018072000.

The previous prime is 21313043977. The next prime is 21313044013. The reversal of 21313044011 is 11044031312.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21313044011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21313044013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20853740 + ... + 20854761.

It is an arithmetic number, because the mean of its divisors is an integer number (3086429148).

Almost surely, 2^21313044011 is an apocalyptic number.

21313044011 is a deficient number, since it is larger than the sum of its proper divisors (3378389173).

21313044011 is an equidigital number, since it uses as much as digits as its factorization.

21313044011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41708581.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21313044011 its reverse (11044031312), we get a palindrome (32357075323).

The spelling of 21313044011 in words is "twenty-one billion, three hundred thirteen million, forty-four thousand, eleven".