221422126 has 16 divisors (see below), whose sum is σ = 334764000. Its totient is φ = 109837728.

The previous prime is 221422111. The next prime is 221422129. The reversal of 221422126 is 621224122.

It is a junction number, because it is equal to n+sod(n) for n = 221422097 and 221422106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221422129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 202036 + ... + 203128.

It is an arithmetic number, because the mean of its divisors is an integer number (20922750).

Almost surely, 2^221422126 is an apocalyptic number.

221422126 is a deficient number, since it is larger than the sum of its proper divisors (113341874).

221422126 is a wasteful number, since it uses less digits than its factorization.

221422126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1803.

The product of its digits is 768, while the sum is 22.

The square root of 221422126 is about 14880.2596079504. The cubic root of 221422126 is about 604.9790544396.

Adding to 221422126 its reverse (621224122), we get a palindrome (842646248).

The spelling of 221422126 in words is "two hundred twenty-one million, four hundred twenty-two thousand, one hundred twenty-six".