221121202221113 has 2 divisors, whose sum is σ = 221121202221114. Its totient is φ = 221121202221112.

The previous prime is 221121202221109. The next prime is 221121202221181. The reversal of 221121202221113 is 311122202121122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 204552696004864 + 16568506216249 = 14302192^2 + 4070443^2 .

It is a cyclic number.

It is not a de Polignac number, because 221121202221113 - 2² = 221121202221109 is a prime.

It is not a weakly prime, because it can be changed into another prime (221121202221013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110560601110556 + 110560601110557.

It is an arithmetic number, because the mean of its divisors is an integer number (110560601110557).

Almost surely, 2^{221121202221113} is an apocalyptic number.

It is an amenable number.

221121202221113 is a deficient number, since it is larger than the sum of its proper divisors (1).

221121202221113 is an equidigital number, since it uses as much as digits as its factorization.

221121202221113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 23.

Adding to 221121202221113 its reverse (311122202121122), we get a palindrome (532243404342235).

Subtracting 221121202221113 from its reverse (311122202121122), we obtain a palindrome (90000999900009).

The spelling of 221121202221113 in words is "two hundred twenty-one trillion, one hundred twenty-one billion, two hundred two million, two hundred twenty-one thousand, one hundred thirteen".