421221322 has 4 divisors (see below), whose sum is σ = 631831986. Its totient is φ = 210610660.

The previous prime is 421221319. The next prime is 421221323. The reversal of 421221322 is 223122124.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 399960001 + 21261321 = 19999^2 + 4611^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 421221322.

It is not an unprimeable number, because it can be changed into a prime (421221323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105305329 + ... + 105305332.

Almost surely, 2^421221322 is an apocalyptic number.

421221322 is a deficient number, since it is larger than the sum of its proper divisors (210610664).

421221322 is a wasteful number, since it uses less digits than its factorization.

421221322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210610663.

The product of its digits is 384, while the sum is 19.

The square root of 421221322 is about 20523.6771071853. The cubic root of 421221322 is about 749.6124350183.

Adding to 421221322 its reverse (223122124), we get a palindrome (644343446).

The spelling of 421221322 in words is "four hundred twenty-one million, two hundred twenty-one thousand, three hundred twenty-two".