221201321223 has 16 divisors (see below), whose sum is σ = 295202589696. Its totient is φ = 147333869760.

The previous prime is 221201321203. The next prime is 221201321251. The reversal of 221201321223 is 322123102122.

It is a de Polignac number, because none of the positive numbers 2^k-221201321223 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221201321223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221201321203) 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, 17615115 + ... + 17627667.

It is an arithmetic number, because the mean of its divisors is an integer number (18450161856).

Almost surely, 2^221201321223 is an apocalyptic number.

221201321223 is a deficient number, since it is larger than the sum of its proper divisors (74001268473).

221201321223 is a wasteful number, since it uses less digits than its factorization.

221201321223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17414.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 221201321223 its reverse (322123102122), we get a palindrome (543324423345).

The spelling of 221201321223 in words is "two hundred twenty-one billion, two hundred one million, three hundred twenty-one thousand, two hundred twenty-three".