422143240424221 has 8 divisors (see below), whose sum is σ = 437159161444824. Its totient is φ = 407388465856320.

The previous prime is 422143240424197. The next prime is 422143240424237. The reversal of 422143240424221 is 122424042341224.

It can be written as a sum of positive squares in 4 ways, for example, as 9627398868025 + 412515841556196 = 3102805^2 + 20310486^2 .

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 422143240424221 - 2⁷ = 422143240424093 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 (422143240424261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65286609886 + ... + 65286616351.

It is an arithmetic number, because the mean of its divisors is an integer number (54644895180603).

Almost surely, 2^{422143240424221} is an apocalyptic number.

It is an amenable number.

422143240424221 is a deficient number, since it is larger than the sum of its proper divisors (15015921020603).

422143240424221 is a wasteful number, since it uses less digits than its factorization.

422143240424221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130573226351.

The product of its (nonzero) digits is 196608, while the sum is 37.

Adding to 422143240424221 its reverse (122424042341224), we get a palindrome (544567282765445).

The spelling of 422143240424221 in words is "four hundred twenty-two trillion, one hundred forty-three billion, two hundred forty million, four hundred twenty-four thousand, two hundred twenty-one".