221422124 has 96 divisors (see below), whose sum is σ = 513891840. Its totient is φ = 80870400.

The previous prime is 221422111. The next prime is 221422129. The reversal of 221422124 is 421224122.

221422124 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 221422096 and 221422105.

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

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 918644 + ... + 918884.

It is an arithmetic number, because the mean of its divisors is an integer number (5353040).

Almost surely, 2^221422124 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221422124, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (256945920).

221422124 is an abundant number, since it is smaller than the sum of its proper divisors (292469716).

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

221422124 is a wasteful number, since it uses less digits than its factorization.

221422124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439 (or 437 counting only the distinct ones).

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

The square root of 221422124 is about 14880.2595407473. The cubic root of 221422124 is about 604.9790526181.

Adding to 221422124 its reverse (421224122), we get a palindrome (642646246).

The spelling of 221422124 in words is "two hundred twenty-one million, four hundred twenty-two thousand, one hundred twenty-four".