422012221 has 8 divisors (see below), whose sum is σ = 434811384. Its totient is φ = 409332480.

The previous prime is 422012209. The next prime is 422012243. The reversal of 422012221 is 122210224.

It can be written as a sum of positive squares in 4 ways, for example, as 61544025 + 360468196 = 7845^2 + 18986^2 .

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 422012221 - 2⁵ = 422012189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 422012195 and 422012204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422012281) 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, 22656 + ... + 36841.

It is an arithmetic number, because the mean of its divisors is an integer number (54351423).

Almost surely, 2^422012221 is an apocalyptic number.

422012221 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

422012221 is a deficient number, since it is larger than the sum of its proper divisors (12799163).

422012221 is a wasteful number, since it uses less digits than its factorization.

422012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59711.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 422012221 is about 20542.9360365066. The cubic root of 422012221 is about 750.0813073333.

Adding to 422012221 its reverse (122210224), we get a palindrome (544222445).

The spelling of 422012221 in words is "four hundred twenty-two million, twelve thousand, two hundred twenty-one".