22213322421421 has 4 divisors (see below), whose sum is σ = 22216712222332. Its totient is φ = 22209932620512.

The previous prime is 22213322421383. The next prime is 22213322421457. The reversal of 22213322421421 is 12412422331222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14715555799396 + 7497766622025 = 3836086^2 + 2738205^2 .

It is a cyclic number.

It is not a de Polignac number, because 22213322421421 - 2¹³ = 22213322413229 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 (22213322424421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1694890626 + ... + 1694903731.

It is an arithmetic number, because the mean of its divisors is an integer number (5554178055583).

Almost surely, 2^{22213322421421} is an apocalyptic number.

It is an amenable number.

22213322421421 is a deficient number, since it is larger than the sum of its proper divisors (3389800911).

22213322421421 is an equidigital number, since it uses as much as digits as its factorization.

22213322421421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3389800910.

The product of its digits is 18432, while the sum is 31.

Adding to 22213322421421 its reverse (12412422331222), we get a palindrome (34625744752643).

The spelling of 22213322421421 in words is "twenty-two trillion, two hundred thirteen billion, three hundred twenty-two million, four hundred twenty-one thousand, four hundred twenty-one".