221223122 has 8 divisors (see below), whose sum is σ = 332211456. Its totient is φ = 110485972.

The previous prime is 221223109. The next prime is 221223127. The reversal of 221223122 is 221322122.

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

It is a self number, because there is not a number n which added to its sum of digits gives 221223122.

It is not an unprimeable number, because it can be changed into a prime (221223127) 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, 60578 + ... + 64125.

It is an arithmetic number, because the mean of its divisors is an integer number (41526432).

Almost surely, 2^221223122 is an apocalyptic number.

221223122 is a deficient number, since it is larger than the sum of its proper divisors (110988334).

221223122 is a wasteful number, since it uses less digits than its factorization.

221223122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125592.

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

The square root of 221223122 is about 14873.5712591159. The cubic root of 221223122 is about 604.7977576862.

Adding to 221223122 its reverse (221322122), we get a palindrome (442545244).

The spelling of 221223122 in words is "two hundred twenty-one million, two hundred twenty-three thousand, one hundred twenty-two".