230111221 has 4 divisors (see below), whose sum is σ = 230150700. Its totient is φ = 230071744.

The previous prime is 230111209. The next prime is 230111227. The reversal of 230111221 is 122111032.

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

It can be written as a sum of positive squares in 2 ways, for example, as 20151121 + 209960100 = 4489^2 + 14490^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-230111221 is a prime.

It is a super-2 number, since 2×230111221² = 105902348060221682, which 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 (230111227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9076 + ... + 23293.

It is an arithmetic number, because the mean of its divisors is an integer number (57537675).

Almost surely, 2^230111221 is an apocalyptic number.

It is an amenable number.

230111221 is a deficient number, since it is larger than the sum of its proper divisors (39479).

230111221 is an equidigital number, since it uses as much as digits as its factorization.

230111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39478.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 230111221 is about 15169.4172926978. The cubic root of 230111221 is about 612.7913114342.

Adding to 230111221 its reverse (122111032), we get a palindrome (352222253).

The spelling of 230111221 in words is "two hundred thirty million, one hundred eleven thousand, two hundred twenty-one".