221242113 has 12 divisors (see below), whose sum is σ = 326371968. Its totient is φ = 144356280.

The previous prime is 221242103. The next prime is 221242127. The reversal of 221242113 is 311242122.

It is a happy number.

221242113 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221242113 - 2¹⁰ = 221241089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221242103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 261093 + ... + 261938.

It is an arithmetic number, because the mean of its divisors is an integer number (27197664).

Almost surely, 2^221242113 is an apocalyptic number.

It is an amenable number.

221242113 is a deficient number, since it is larger than the sum of its proper divisors (105129855).

221242113 is a wasteful number, since it uses less digits than its factorization.

221242113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523084 (or 523081 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 221242113 is about 14874.2096596760. The cubic root of 221242113 is about 604.8150635709.

Adding to 221242113 its reverse (311242122), we get a palindrome (532484235).

Subtracting 221242113 from its reverse (311242122), we obtain a palindrome (90000009).

The spelling of 221242113 in words is "two hundred twenty-one million, two hundred forty-two thousand, one hundred thirteen".