221421422 has 4 divisors (see below), whose sum is σ = 332132136. Its totient is φ = 110710710.

The previous prime is 221421419. The next prime is 221421461. The reversal of 221421422 is 224124122.

221421422 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×221421422² = 98054892241004168, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221421394 and 221421403.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55355354 + ... + 55355357.

It is an arithmetic number, because the mean of its divisors is an integer number (83033034).

Almost surely, 2^221421422 is an apocalyptic number.

221421422 is a deficient number, since it is larger than the sum of its proper divisors (110710714).

221421422 is a wasteful number, since it uses less digits than its factorization.

221421422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110710713.

The product of its digits is 512, while the sum is 20.

The square root of 221421422 is about 14880.2359524303. The cubic root of 221421422 is about 604.9784132725.

Adding to 221421422 its reverse (224124122), we get a palindrome (445545544).

The spelling of 221421422 in words is "two hundred twenty-one million, four hundred twenty-one thousand, four hundred twenty-two".