12211211331 has 24 divisors (see below), whose sum is σ = 19249002864. Its totient is φ = 7398005760.

The previous prime is 12211211293. The next prime is 12211211347. The reversal of 12211211331 is 13311211221.

12211211331 is a `hidden beast` number, since 122 + 1 + 1 + 211 + 331 = 666.

12211211331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-12211211331 is a prime.

It is a super-2 number, since 2×12211211331² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12211211371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 265515 + ... + 308091.

It is an arithmetic number, because the mean of its divisors is an integer number (802041786).

Almost surely, 2^12211211331 is an apocalyptic number.

12211211331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12211211331 is a deficient number, since it is larger than the sum of its proper divisors (7037791533).

12211211331 is a wasteful number, since it uses less digits than its factorization.

12211211331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45491 (or 45488 counting only the distinct ones).

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

Adding to 12211211331 its reverse (13311211221), we get a palindrome (25522422552).

The spelling of 12211211331 in words is "twelve billion, two hundred eleven million, two hundred eleven thousand, three hundred thirty-one".