21344001213 has 8 divisors (see below), whose sum is σ = 28459523488. Its totient is φ = 14228906544.

The previous prime is 21344001209. The next prime is 21344001223. The reversal of 21344001213 is 31210044312.

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

It is not a de Polignac number, because 21344001213 - 2² = 21344001209 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21344001213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21344001223) 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, 37395 + ... + 209967.

It is an arithmetic number, because the mean of its divisors is an integer number (3557440436).

Almost surely, 2^21344001213 is an apocalyptic number.

It is an amenable number.

21344001213 is a deficient number, since it is larger than the sum of its proper divisors (7115522275).

21344001213 is a wasteful number, since it uses less digits than its factorization.

21344001213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213803.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21344001213 its reverse (31210044312), we get a palindrome (52554045525).

The spelling of 21344001213 in words is "twenty-one billion, three hundred forty-four million, one thousand, two hundred thirteen".