221340104240243 has 16 divisors (see below), whose sum is σ = 236552815173600. Its totient is φ = 206371067068416.

The previous prime is 221340104240239. The next prime is 221340104240261. The reversal of 221340104240243 is 342042401043122.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 221340104240243 - 2² = 221340104240239 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221340104260243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 193613783 + ... + 194753631.

It is an arithmetic number, because the mean of its divisors is an integer number (14784550948350).

Almost surely, 2^{221340104240243} is an apocalyptic number.

221340104240243 is a deficient number, since it is larger than the sum of its proper divisors (15212710933357).

221340104240243 is a wasteful number, since it uses less digits than its factorization.

221340104240243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1246726.

The product of its (nonzero) digits is 36864, while the sum is 32.

Adding to 221340104240243 its reverse (342042401043122), we get a palindrome (563382505283365).

The spelling of 221340104240243 in words is "two hundred twenty-one trillion, three hundred forty billion, one hundred four million, two hundred forty thousand, two hundred forty-three".