23230111221 has 12 divisors (see below), whose sum is σ = 33558179148. Its totient is φ = 15485091264.

The previous prime is 23230111217. The next prime is 23230111249. The reversal of 23230111221 is 12211103232.

23230111221 is a `hidden beast` number, since 232 + 301 + 112 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 9567774225 + 13662336996 = 97815^2 + 116886^2 .

It is not a de Polignac number, because 23230111221 - 2² = 23230111217 is a prime.

It is a super-2 number, since 2×23230111221² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 23230111194 and 23230111203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23230111921) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45000 + ... + 220193.

It is an arithmetic number, because the mean of its divisors is an integer number (2796514929).

Almost surely, 2^23230111221 is an apocalyptic number.

It is an amenable number.

23230111221 is a deficient number, since it is larger than the sum of its proper divisors (10328067927).

23230111221 is a wasteful number, since it uses less digits than its factorization.

23230111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274932 (or 274929 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 23230111221 its reverse (12211103232), we get a palindrome (35441214453).

It can be divided in two parts, 2323011 and 1221, that added together give a palindrome (2324232).

The spelling of 23230111221 in words is "twenty-three billion, two hundred thirty million, one hundred eleven thousand, two hundred twenty-one".