12231321221 has 8 divisors (see below), whose sum is σ = 14051841024. Its totient is φ = 10429098480.

The previous prime is 12231321181. The next prime is 12231321227. The reversal of 12231321221 is 12212313221.

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

It is a cyclic number.

It is not a de Polignac number, because 12231321221 - 2¹⁴ = 12231304837 is a prime.

It is a super-2 number, since 2×12231321221² (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 = 12231321193 and 12231321202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12231321227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4572830 + ... + 4575503.

It is an arithmetic number, because the mean of its divisors is an integer number (1756480128).

Almost surely, 2^12231321221 is an apocalyptic number.

It is an amenable number.

12231321221 is a deficient number, since it is larger than the sum of its proper divisors (1820519803).

12231321221 is an equidigital number, since it uses as much as digits as its factorization.

12231321221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9148531.

The product of its digits is 288, while the sum is 20.

Adding to 12231321221 its reverse (12212313221), we get a palindrome (24443634442).

The spelling of 12231321221 in words is "twelve billion, two hundred thirty-one million, three hundred twenty-one thousand, two hundred twenty-one".