12211320321 has 48 divisors (see below), whose sum is σ = 18864413568. Its totient is φ = 7888752000.

The previous prime is 12211320313. The next prime is 12211320389. The reversal of 12211320321 is 12302311221.

12211320321 is a `hidden beast` number, since 1 + 2 + 21 + 1 + 320 + 321 = 666.

It is not a de Polignac number, because 12211320321 - 2³ = 12211320313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12211320294 and 12211320303.

It is not an unprimeable number, because it can be changed into a prime (12211320421) 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, 1500355 + ... + 1508471.

It is an arithmetic number, because the mean of its divisors is an integer number (393008616).

Almost surely, 2^12211320321 is an apocalyptic number.

It is an amenable number.

12211320321 is a deficient number, since it is larger than the sum of its proper divisors (6653093247).

12211320321 is an equidigital number, since it uses as much as digits as its factorization.

12211320321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8324 (or 8312 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 12211320321 its reverse (12302311221), we get a palindrome (24513631542).

The spelling of 12211320321 in words is "twelve billion, two hundred eleven million, three hundred twenty thousand, three hundred twenty-one".