421200022 has 4 divisors (see below), whose sum is σ = 631800036. Its totient is φ = 210600010.

The previous prime is 421199993. The next prime is 421200047. The reversal of 421200022 is 220002124.

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

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 421199975 and 421200011.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105300004 + ... + 105300007.

It is an arithmetic number, because the mean of its divisors is an integer number (157950009).

Almost surely, 2^421200022 is an apocalyptic number.

421200022 is a deficient number, since it is larger than the sum of its proper divisors (210600014).

421200022 is a wasteful number, since it uses less digits than its factorization.

421200022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210600013.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 421200022 is about 20523.1581877644. The cubic root of 421200022 is about 749.5997995278.

Adding to 421200022 its reverse (220002124), we get a palindrome (641202146).

The spelling of 421200022 in words is "four hundred twenty-one million, two hundred thousand, twenty-two".