221213113 has 8 divisors (see below), whose sum is σ = 246936096. Its totient is φ = 196425600.

The previous prime is 221213099. The next prime is 221213123. The reversal of 221213113 is 311312122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221213113 - 2¹⁷ = 221082041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221213123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 233368 + ... + 234313.

It is an arithmetic number, because the mean of its divisors is an integer number (30867012).

Almost surely, 2^221213113 is an apocalyptic number.

It is an amenable number.

221213113 is a deficient number, since it is larger than the sum of its proper divisors (25722983).

221213113 is a wasteful number, since it uses less digits than its factorization.

221213113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467735.

The product of its digits is 72, while the sum is 16.

The square root of 221213113 is about 14873.2347860175. The cubic root of 221213113 is about 604.7886364093.

Adding to 221213113 its reverse (311312122), we get a palindrome (532525235).

Subtracting 221213113 from its reverse (311312122), we obtain a palindrome (90099009).

The spelling of 221213113 in words is "two hundred twenty-one million, two hundred thirteen thousand, one hundred thirteen".