221001012223 has 4 divisors (see below), whose sum is σ = 224113702608. Its totient is φ = 217888321840.

The previous prime is 221001012217. The next prime is 221001012227. The reversal of 221001012223 is 322210100122.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221001012223 - 2⁵ = 221001012191 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221001012197 and 221001012206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221001012227) 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, 1556345086 + ... + 1556345227.

It is an arithmetic number, because the mean of its divisors is an integer number (56028425652).

Almost surely, 2^221001012223 is an apocalyptic number.

221001012223 is a deficient number, since it is larger than the sum of its proper divisors (3112690385).

221001012223 is an equidigital number, since it uses as much as digits as its factorization.

221001012223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3112690384.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 221001012223 its reverse (322210100122), we get a palindrome (543211112345).

The spelling of 221001012223 in words is "two hundred twenty-one billion, one million, twelve thousand, two hundred twenty-three".