12233231221 has 4 divisors (see below), whose sum is σ = 12297279744. Its totient is φ = 12169182700.

The previous prime is 12233231183. The next prime is 12233231233. The reversal of 12233231221 is 12213233221.

12233231221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12233231221 - 2¹³ = 12233223029 is a prime.

It is a super-2 number, since 2×12233231221² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12233231192 and 12233231201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12233231321) 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 3 ways as a sum of consecutive naturals, for example, 32023975 + ... + 32024356.

It is an arithmetic number, because the mean of its divisors is an integer number (3074319936).

Almost surely, 2^12233231221 is an apocalyptic number.

It is an amenable number.

12233231221 is a deficient number, since it is larger than the sum of its proper divisors (64048523).

12233231221 is an equidigital number, since it uses as much as digits as its factorization.

12233231221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64048522.

The product of its digits is 864, while the sum is 22.

Adding to 12233231221 its reverse (12213233221), we get a palindrome (24446464442).

The spelling of 12233231221 in words is "twelve billion, two hundred thirty-three million, two hundred thirty-one thousand, two hundred twenty-one".