221313110243 has 12 divisors (see below), whose sum is σ = 231404473608. Its totient is φ = 211644417600.

The previous prime is 221313110177. The next prime is 221313110251. The reversal of 221313110243 is 342011313122.

It is not a de Polignac number, because 221313110243 - 2¹⁰ = 221313109219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221313110143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2504768 + ... + 2591618.

It is an arithmetic number, because the mean of its divisors is an integer number (19283706134).

Almost surely, 2^221313110243 is an apocalyptic number.

221313110243 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

221313110243 is a deficient number, since it is larger than the sum of its proper divisors (10091363365).

221313110243 is an equidigital number, since it uses as much as digits as its factorization.

221313110243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91714 (or 91691 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 221313110243 its reverse (342011313122), we get a palindrome (563324423365).

The spelling of 221313110243 in words is "two hundred twenty-one billion, three hundred thirteen million, one hundred ten thousand, two hundred forty-three".