221404220113 has 2 divisors, whose sum is σ = 221404220114. Its totient is φ = 221404220112.

The previous prime is 221404220111. The next prime is 221404220131. The reversal of 221404220113 is 311022404122.

Together with next prime (221404220131) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 221194317969 + 209902144 = 470313^2 + 14488^2 .

It is a cyclic number.

It is not a de Polignac number, because 221404220113 - 2¹ = 221404220111 is a prime.

Together with 221404220111, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (221404220111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110702110056 + 110702110057.

It is an arithmetic number, because the mean of its divisors is an integer number (110702110057).

Almost surely, 2^221404220113 is an apocalyptic number.

It is an amenable number.

221404220113 is a deficient number, since it is larger than the sum of its proper divisors (1).

221404220113 is an equidigital number, since it uses as much as digits as its factorization.

221404220113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 221404220113 its reverse (311022404122), we get a palindrome (532426624235).

The spelling of 221404220113 in words is "two hundred twenty-one billion, four hundred four million, two hundred twenty thousand, one hundred thirteen".