221344123243 has 16 divisors (see below), whose sum is σ = 233660600320. Its totient is φ = 209094975936.

The previous prime is 221344123219. The next prime is 221344123249. The reversal of 221344123243 is 342321443122.

It is a cyclic number.

It is not a de Polignac number, because 221344123243 - 2⁵ = 221344123211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221344123249) 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, 13776871 + ... + 13792927.

It is an arithmetic number, because the mean of its divisors is an integer number (14603787520).

Almost surely, 2^221344123243 is an apocalyptic number.

221344123243 is a deficient number, since it is larger than the sum of its proper divisors (12316477077).

221344123243 is a wasteful number, since it uses less digits than its factorization.

221344123243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18106.

The product of its digits is 27648, while the sum is 31.

Adding to 221344123243 its reverse (342321443122), we get a palindrome (563665566365).

The spelling of 221344123243 in words is "two hundred twenty-one billion, three hundred forty-four million, one hundred twenty-three thousand, two hundred forty-three".