21214044443 has 8 divisors (see below), whose sum is σ = 21538896912. Its totient is φ = 20889434016.

The previous prime is 21214044437. The next prime is 21214044469. The reversal of 21214044443 is 34444041212.

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 21214044443 - 2⁴ = 21214044427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21214044143) 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, 120221 + ... + 238497.

It is an arithmetic number, because the mean of its divisors is an integer number (2692362114).

Almost surely, 2^21214044443 is an apocalyptic number.

21214044443 is a deficient number, since it is larger than the sum of its proper divisors (324852469).

21214044443 is a wasteful number, since it uses less digits than its factorization.

21214044443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121021.

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 21214044443 its reverse (34444041212), we get a palindrome (55658085655).

The spelling of 21214044443 in words is "twenty-one billion, two hundred fourteen million, forty-four thousand, four hundred forty-three".