421205222 has 16 divisors (see below), whose sum is σ = 654121440. Its totient is φ = 203176512.

The previous prime is 421205221. The next prime is 421205237. The reversal of 421205222 is 222502124.

It is a junction number, because it is equal to n+sod(n) for n = 421205194 and 421205203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421205221) 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, 101378 + ... + 105450.

It is an arithmetic number, because the mean of its divisors is an integer number (40882590).

Almost surely, 2^421205222 is an apocalyptic number.

421205222 is a deficient number, since it is larger than the sum of its proper divisors (232916218).

421205222 is a wasteful number, since it uses less digits than its factorization.

421205222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5887.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 421205222 is about 20523.2848735284. The cubic root of 421205222 is about 749.6028842878.

Adding to 421205222 its reverse (222502124), we get a palindrome (643707346).

The spelling of 421205222 in words is "four hundred twenty-one million, two hundred five thousand, two hundred twenty-two".