221012223 has 16 divisors (see below), whose sum is σ = 312408576. Its totient is φ = 138500480.

The previous prime is 221012201. The next prime is 221012227. The reversal of 221012223 is 322210122.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 221012223 - 2⁵ = 221012191 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221012227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47290 + ... + 51752.

It is an arithmetic number, because the mean of its divisors is an integer number (19525536).

Almost surely, 2^221012223 is an apocalyptic number.

221012223 is a deficient number, since it is larger than the sum of its proper divisors (91396353).

221012223 is a wasteful number, since it uses less digits than its factorization.

221012223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5454.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 221012223 is about 14866.4798456124. The cubic root of 221012223 is about 604.6055056354.

Adding to 221012223 its reverse (322210122), we get a palindrome (543222345).

The spelling of 221012223 in words is "two hundred twenty-one million, twelve thousand, two hundred twenty-three".