221113131 has 8 divisors (see below), whose sum is σ = 298856400. Its totient is φ = 145389312.

The previous prime is 221113129. The next prime is 221113133. The reversal of 221113131 is 131311122.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (221113129) and next prime (221113133).

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

It is not a de Polignac number, because 221113131 - 2¹ = 221113129 is a prime.

It is a super-2 number, since 2×221113131² = 97782033401246322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 221113131.

It is not an unprimeable number, because it can be changed into a prime (221113133) 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, 504606 + ... + 505043.

It is an arithmetic number, because the mean of its divisors is an integer number (37357050).

Almost surely, 2^221113131 is an apocalyptic number.

221113131 is a deficient number, since it is larger than the sum of its proper divisors (77743269).

221113131 is a wasteful number, since it uses less digits than its factorization.

221113131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009725.

The product of its digits is 36, while the sum is 15.

The square root of 221113131 is about 14869.8732677854. The cubic root of 221113131 is about 604.6975069567.

Adding to 221113131 its reverse (131311122), we get a palindrome (352424253).

The spelling of 221113131 in words is "two hundred twenty-one million, one hundred thirteen thousand, one hundred thirty-one".