221113301231 has 4 divisors (see below), whose sum is σ = 221115192552. Its totient is φ = 221111409912.

The previous prime is 221113301219. The next prime is 221113301261. The reversal of 221113301231 is 132103311122.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221113301231 is a prime.

It is a super-2 number, since 2×221113301231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221113301261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 757865 + ... + 1008258.

It is an arithmetic number, because the mean of its divisors is an integer number (55278798138).

Almost surely, 2^221113301231 is an apocalyptic number.

221113301231 is a deficient number, since it is larger than the sum of its proper divisors (1891321).

221113301231 is a wasteful number, since it uses less digits than its factorization.

221113301231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1891320.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 221113301231 its reverse (132103311122), we get a palindrome (353216612353).

The spelling of 221113301231 in words is "two hundred twenty-one billion, one hundred thirteen million, three hundred one thousand, two hundred thirty-one".