422321220221 has 4 divisors (see below), whose sum is σ = 433735307292. Its totient is φ = 410907133152.

The previous prime is 422321220199. The next prime is 422321220227. The reversal of 422321220221 is 122022123224.

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 395584392025 + 26736828196 = 628955^2 + 163514^2 .

It is a cyclic number.

It is not a de Polignac number, because 422321220221 - 2⁶ = 422321220157 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 (422321220227) 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, 5707043480 + ... + 5707043553.

It is an arithmetic number, because the mean of its divisors is an integer number (108433826823).

Almost surely, 2^422321220221 is an apocalyptic number.

It is an amenable number.

422321220221 is a deficient number, since it is larger than the sum of its proper divisors (11414087071).

422321220221 is a wasteful number, since it uses less digits than its factorization.

422321220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11414087070.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 422321220221 its reverse (122022123224), we get a palindrome (544343343445).

The spelling of 422321220221 in words is "four hundred twenty-two billion, three hundred twenty-one million, two hundred twenty thousand, two hundred twenty-one".