12311030221 has 16 divisors (see below), whose sum is σ = 14816678400. Its totient is φ = 9992595888.

The previous prime is 12311030203. The next prime is 12311030231. The reversal of 12311030221 is 12203011321.

It is a cyclic number.

It is not a de Polignac number, because 12311030221 - 2³¹ = 10163546573 is a prime.

It is a super-3 number, since 3×12311030221³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12311030195 and 12311030204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12311030231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 308226 + ... + 345868.

It is an arithmetic number, because the mean of its divisors is an integer number (926042400).

Almost surely, 2^12311030221 is an apocalyptic number.

It is an amenable number.

12311030221 is a deficient number, since it is larger than the sum of its proper divisors (2505648179).

12311030221 is a wasteful number, since it uses less digits than its factorization.

12311030221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40128.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 12311030221 its reverse (12203011321), we get a palindrome (24514041542).

The spelling of 12311030221 in words is "twelve billion, three hundred eleven million, thirty thousand, two hundred twenty-one".