21222016423613 has 8 divisors (see below), whose sum is σ = 21893322490368. Its totient is φ = 20555854465104.

The previous prime is 21222016423571. The next prime is 21222016423633. The reversal of 21222016423613 is 31632461022212.

It is a happy number.

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

It is not a de Polignac number, because 21222016423613 - 2⁶ = 21222016423549 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 (21222016423633) 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, 1286018681 + ... + 1286035182.

It is an arithmetic number, because the mean of its divisors is an integer number (2736665311296).

Almost surely, 2^{21222016423613} is an apocalyptic number.

It is an amenable number.

21222016423613 is a deficient number, since it is larger than the sum of its proper divisors (671306066755).

21222016423613 is a wasteful number, since it uses less digits than its factorization.

21222016423613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2572054123.

The product of its (nonzero) digits is 41472, while the sum is 35.

Adding to 21222016423613 its reverse (31632461022212), we get a palindrome (52854477445825).

The spelling of 21222016423613 in words is "twenty-one trillion, two hundred twenty-two billion, sixteen million, four hundred twenty-three thousand, six hundred thirteen".