22422420421 has 4 divisors (see below), whose sum is σ = 22536240012. Its totient is φ = 22308600832.

The previous prime is 22422420379. The next prime is 22422420451. The reversal of 22422420421 is 12402422422.

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 10532916900 + 11889503521 = 102630^2 + 109039^2 .

It is a cyclic number.

It is not a de Polignac number, because 22422420421 - 2¹⁵ = 22422387653 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 (22422420451) 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, 56909500 + ... + 56909893.

It is an arithmetic number, because the mean of its divisors is an integer number (5634060003).

Almost surely, 2^22422420421 is an apocalyptic number.

It is an amenable number.

22422420421 is a deficient number, since it is larger than the sum of its proper divisors (113819591).

22422420421 is a wasteful number, since it uses less digits than its factorization.

22422420421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113819590.

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

Adding to 22422420421 its reverse (12402422422), we get a palindrome (34824842843).

The spelling of 22422420421 in words is "twenty-two billion, four hundred twenty-two million, four hundred twenty thousand, four hundred twenty-one".