12311211321 has 6 divisors (see below), whose sum is σ = 17782860810. Its totient is φ = 8207474208.

The previous prime is 12311211293. The next prime is 12311211347.

12311211321 is a `hidden beast` number, since 12 + 311 + 21 + 1 + 321 = 666.

12311211321 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 8174148921 + 4137062400 = 90411^2 + 64320^2 .

It is not a de Polignac number, because 12311211321 - 2¹³ = 12311203129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12311211294 and 12311211303.

It is not an unprimeable number, because it can be changed into a prime (12311211221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 683956176 + ... + 683956193.

It is an arithmetic number, because the mean of its divisors is an integer number (2963810135).

Almost surely, 2^12311211321 is an apocalyptic number.

It is an amenable number.

12311211321 is a deficient number, since it is larger than the sum of its proper divisors (5471649489).

12311211321 is a wasteful number, since it uses less digits than its factorization.

12311211321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1367912375 (or 1367912372 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

The spelling of 12311211321 in words is "twelve billion, three hundred eleven million, two hundred eleven thousand, three hundred twenty-one".