422401131221 has 8 divisors (see below), whose sum is σ = 436992197400. Its totient is φ = 407811765760.

The previous prime is 422401131209. The next prime is 422401131227. The reversal of 422401131221 is 122131104224.

It can be written as a sum of positive squares in 4 ways, for example, as 33056330596 + 389344800625 = 181814^2 + 623975^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 422401131221 - 2¹⁰ = 422401130197 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 (422401131227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90761 + ... + 923601.

It is an arithmetic number, because the mean of its divisors is an integer number (54624024675).

Almost surely, 2^422401131221 is an apocalyptic number.

It is an amenable number.

422401131221 is a deficient number, since it is larger than the sum of its proper divisors (14591066179).

422401131221 is a wasteful number, since it uses less digits than its factorization.

422401131221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 850359.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 422401131221 its reverse (122131104224), we get a palindrome (544532235445).

The spelling of 422401131221 in words is "four hundred twenty-two billion, four hundred one million, one hundred thirty-one thousand, two hundred twenty-one".