221113321 has 8 divisors (see below), whose sum is σ = 259769664. Its totient is φ = 185549520.

The previous prime is 221113303. The next prime is 221113327. The reversal of 221113321 is 123311122.

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

It is not a de Polignac number, because 221113321 - 2⁹ = 221112809 is a prime.

It is a super-2 number, since 2×221113321² = 97782201447298082, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221113295 and 221113304.

It is not an unprimeable number, because it can be changed into a prime (221113327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 772981 + ... + 773266.

It is an arithmetic number, because the mean of its divisors is an integer number (32471208).

Almost surely, 2^221113321 is an apocalyptic number.

It is an amenable number.

221113321 is a deficient number, since it is larger than the sum of its proper divisors (38656343).

221113321 is a wasteful number, since it uses less digits than its factorization.

221113321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1546271.

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

The square root of 221113321 is about 14869.8796565406. The cubic root of 221113321 is about 604.6976801599.

Adding to 221113321 its reverse (123311122), we get a palindrome (344424443).

The spelling of 221113321 in words is "two hundred twenty-one million, one hundred thirteen thousand, three hundred twenty-one".