421221204222 has 32 divisors (see below), whose sum is σ = 1036852196352. Its totient is φ = 111091306464.

The previous prime is 421221204037. The next prime is 421221204233. The reversal of 421221204222 is 222402122124.

It is a junction number, because it is equal to n+sod(n) for n = 421221204192 and 421221204201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 385733158 + ... + 385734249.

It is an arithmetic number, because the mean of its divisors is an integer number (32401631136).

Almost surely, 2^421221204222 is an apocalyptic number.

421221204222 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

421221204222 is an abundant number, since it is smaller than the sum of its proper divisors (615630992130).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421221204222 is a wasteful number, since it uses less digits than its factorization.

421221204222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771467432.

The product of its (nonzero) digits is 2048, while the sum is 24.

Adding to 421221204222 its reverse (222402122124), we get a palindrome (643623326346).

The spelling of 421221204222 in words is "four hundred twenty-one billion, two hundred twenty-one million, two hundred four thousand, two hundred twenty-two".