21220144213 has 8 divisors (see below), whose sum is σ = 21749555520. Its totient is φ = 20691297120.

The previous prime is 21220144193. The next prime is 21220144223. The reversal of 21220144213 is 31244102212.

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 21220144213 - 2⁹ = 21220143701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220144223) 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, 64383 + ... + 215836.

It is an arithmetic number, because the mean of its divisors is an integer number (2718694440).

Almost surely, 2^21220144213 is an apocalyptic number.

It is an amenable number.

21220144213 is a deficient number, since it is larger than the sum of its proper divisors (529411307).

21220144213 is a wasteful number, since it uses less digits than its factorization.

21220144213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282107.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 21220144213 its reverse (31244102212), we get a palindrome (52464246425).

The spelling of 21220144213 in words is "twenty-one billion, two hundred twenty million, one hundred forty-four thousand, two hundred thirteen".