12211122321 has 48 divisors (see below), whose sum is σ = 19206720000. Its totient is φ = 7444652544.

The previous prime is 12211122317. The next prime is 12211122347. The reversal of 12211122321 is 12322111221.

12211122321 is a `hidden beast` number, since 1 + 221 + 1 + 122 + 321 = 666.

It is not a de Polignac number, because 12211122321 - 2² = 12211122317 is a prime.

It is a super-2 number, since 2×12211122321² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12211122294 and 12211122303.

It is not an unprimeable number, because it can be changed into a prime (12211122361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8145430 + ... + 8146928.

It is an arithmetic number, because the mean of its divisors is an integer number (400140000).

Almost surely, 2^12211122321 is an apocalyptic number.

It is an amenable number.

12211122321 is a deficient number, since it is larger than the sum of its proper divisors (6995597679).

12211122321 is a wasteful number, since it uses less digits than its factorization.

12211122321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2998 (or 2995 counting only the distinct ones).

The product of its digits is 96, while the sum is 18.

Adding to 12211122321 its reverse (12322111221), we get a palindrome (24533233542).

The spelling of 12211122321 in words is "twelve billion, two hundred eleven million, one hundred twenty-two thousand, three hundred twenty-one".