221221001220223 has 8 divisors (see below), whose sum is σ = 228952889373600. Its totient is φ = 213600363256320.

The previous prime is 221221001220221. The next prime is 221221001220227. The reversal of 221221001220223 is 322022100122122.

It is a happy number.

221221001220223 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 221221001220223 - 2¹ = 221221001220221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221221001220194 and 221221001220203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221221001220221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27812543323 + ... + 27812551276.

It is an arithmetic number, because the mean of its divisors is an integer number (28619111171700).

Almost surely, 2^{221221001220223} is an apocalyptic number.

221221001220223 is a deficient number, since it is larger than the sum of its proper divisors (7731888153377).

221221001220223 is an equidigital number, since it uses as much as digits as its factorization.

221221001220223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55625094737.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 221221001220223 its reverse (322022100122122), we get a palindrome (543243101342345).

The spelling of 221221001220223 in words is "two hundred twenty-one trillion, two hundred twenty-one billion, one million, two hundred twenty thousand, two hundred twenty-three".