422403232221 has 6 divisors (see below), whose sum is σ = 610138002110. Its totient is φ = 281602154808.

The previous prime is 422403232169. The next prime is 422403232253. The reversal of 422403232221 is 122232304224.

422403232221 is a `hidden beast` number, since 4 + 2 + 2 + 403 + 2 + 32 + 221 = 666.

It can be written as a sum of positive squares in only one way, i.e., 348087020121 + 74316212100 = 589989^2 + 272610^2 .

It is not a de Polignac number, because 422403232221 - 2⁹ = 422403231709 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 (422403232261) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23466846226 + ... + 23466846243.

Almost surely, 2^422403232221 is an apocalyptic number.

It is an amenable number.

422403232221 is a deficient number, since it is larger than the sum of its proper divisors (187734769889).

422403232221 is a wasteful number, since it uses less digits than its factorization.

422403232221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46933692475 (or 46933692472 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 422403232221 its reverse (122232304224), we get a palindrome (544635536445).

The spelling of 422403232221 in words is "four hundred twenty-two billion, four hundred three million, two hundred thirty-two thousand, two hundred twenty-one".