221340117 has 4 divisors (see below), whose sum is σ = 295120160. Its totient is φ = 147560076.

The previous prime is 221340079. The next prime is 221340127. The reversal of 221340117 is 711043122.

221340117 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 221340117 - 2¹⁸ = 221077973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221340093 and 221340102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221340127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36890017 + ... + 36890022.

It is an arithmetic number, because the mean of its divisors is an integer number (73780040).

Almost surely, 2^221340117 is an apocalyptic number.

It is an amenable number.

221340117 is a deficient number, since it is larger than the sum of its proper divisors (73780043).

221340117 is an equidigital number, since it uses as much as digits as its factorization.

221340117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73780042.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 221340117 is about 14877.5037220631. The cubic root of 221340117 is about 604.9043557112.

Adding to 221340117 its reverse (711043122), we get a palindrome (932383239).

The spelling of 221340117 in words is "two hundred twenty-one million, three hundred forty thousand, one hundred seventeen".