221244124 has 12 divisors (see below), whose sum is σ = 387311400. Its totient is φ = 110583728.

The previous prime is 221244097. The next prime is 221244173. The reversal of 221244124 is 421442122.

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 = 221244095 and 221244104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6342 + ... + 21970.

It is an arithmetic number, because the mean of its divisors is an integer number (32275950).

Almost surely, 2^221244124 is an apocalyptic number.

It is an amenable number.

221244124 is a deficient number, since it is larger than the sum of its proper divisors (166067276).

221244124 is a wasteful number, since it uses less digits than its factorization.

221244124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19172 (or 19170 counting only the distinct ones).

The product of its digits is 1024, while the sum is 22.

The square root of 221244124 is about 14874.2772597528. The cubic root of 221244124 is about 604.8168960723.

Adding to 221244124 its reverse (421442122), we get a palindrome (642686246).

The spelling of 221244124 in words is "two hundred twenty-one million, two hundred forty-four thousand, one hundred twenty-four".