22042404421 has 4 divisors (see below), whose sum is σ = 22047325792. Its totient is φ = 22037483052.

The previous prime is 22042404403. The next prime is 22042404467. The reversal of 22042404421 is 12440424022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22042404421 - 2¹⁵ = 22042371653 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 (22042444421) 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, 2453961 + ... + 2462926.

It is an arithmetic number, because the mean of its divisors is an integer number (5511831448).

Almost surely, 2^22042404421 is an apocalyptic number.

It is an amenable number.

22042404421 is a deficient number, since it is larger than the sum of its proper divisors (4921371).

22042404421 is an equidigital number, since it uses as much as digits as its factorization.

22042404421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4921370.

The product of its (nonzero) digits is 4096, while the sum is 25.

Adding to 22042404421 its reverse (12440424022), we get a palindrome (34482828443).

The spelling of 22042404421 in words is "twenty-two billion, forty-two million, four hundred four thousand, four hundred twenty-one".