12221032231 has 4 divisors (see below), whose sum is σ = 12347022352. Its totient is φ = 12095042112.

The previous prime is 12221032183. The next prime is 12221032277. The reversal of 12221032231 is 13223012221.

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

It is a cyclic number.

It is not a de Polignac number, because 12221032231 - 2¹¹ = 12221030183 is a prime.

It is a super-2 number, since 2×12221032231² (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 = 12221032199 and 12221032208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221032331) 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, 62994915 + ... + 62995108.

It is an arithmetic number, because the mean of its divisors is an integer number (3086755588).

Almost surely, 2^12221032231 is an apocalyptic number.

12221032231 is a deficient number, since it is larger than the sum of its proper divisors (125990121).

12221032231 is an equidigital number, since it uses as much as digits as its factorization.

12221032231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125990120.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 12221032231 its reverse (13223012221), we get a palindrome (25444044452).

The spelling of 12221032231 in words is "twelve billion, two hundred twenty-one million, thirty-two thousand, two hundred thirty-one".