221313030431243 has 4 divisors (see below), whose sum is σ = 234331443986040. Its totient is φ = 208294616876448.

The previous prime is 221313030431203. The next prime is 221313030431249. The reversal of 221313030431243 is 342134030313122.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-221313030431243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221313030431249) 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 3 ways as a sum of consecutive naturals, for example, 6509206777373 + ... + 6509206777406.

It is an arithmetic number, because the mean of its divisors is an integer number (58582860996510).

Almost surely, 2^{221313030431243} is an apocalyptic number.

221313030431243 is a deficient number, since it is larger than the sum of its proper divisors (13018413554797).

221313030431243 is a wasteful number, since it uses less digits than its factorization.

221313030431243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13018413554796.

The product of its (nonzero) digits is 31104, while the sum is 32.

Adding to 221313030431243 its reverse (342134030313122), we get a palindrome (563447060744365).

The spelling of 221313030431243 in words is "two hundred twenty-one trillion, three hundred thirteen billion, thirty million, four hundred thirty-one thousand, two hundred forty-three".