221224130 has 8 divisors (see below), whose sum is σ = 398203452. Its totient is φ = 88489648.

The previous prime is 221224123. The next prime is 221224139. The reversal of 221224130 is 31422122.

It can be written as a sum of positive squares in 2 ways, for example, as 179479609 + 41744521 = 13397^2 + 6461^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 221224099 and 221224108.

It is not an unprimeable number, because it can be changed into a prime (221224139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11061197 + ... + 11061216.

Almost surely, 2^221224130 is an apocalyptic number.

221224130 is a deficient number, since it is larger than the sum of its proper divisors (176979322).

221224130 is a wasteful number, since it uses less digits than its factorization.

221224130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22122420.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 221224130 is about 14873.6051446850. The cubic root of 221224130 is about 604.7986762689.

Adding to 221224130 its reverse (31422122), we get a palindrome (252646252).

The spelling of 221224130 in words is "two hundred twenty-one million, two hundred twenty-four thousand, one hundred thirty".