221252441243 has 8 divisors (see below), whose sum is σ = 225009945600. Its totient is φ = 217495185768.

The previous prime is 221252441183. The next prime is 221252441309. The reversal of 221252441243 is 342144252122.

221252441243 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 221252441243 - 2¹⁴ = 221252424859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221252441743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2992718 + ... + 3065756.

It is an arithmetic number, because the mean of its divisors is an integer number (28126243200).

Almost surely, 2^221252441243 is an apocalyptic number.

221252441243 is a deficient number, since it is larger than the sum of its proper divisors (3757504357).

221252441243 is an equidigital number, since it uses as much as digits as its factorization.

221252441243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124441.

The product of its digits is 30720, while the sum is 32.

Adding to 221252441243 its reverse (342144252122), we get a palindrome (563396693365).

The spelling of 221252441243 in words is "two hundred twenty-one billion, two hundred fifty-two million, four hundred forty-one thousand, two hundred forty-three".