12211331 has 8 divisors (see below), whose sum is σ = 13353984. Its totient is φ = 11074120.

The previous prime is 12211327. The next prime is 12211333. The reversal of 12211331 is 13311221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12211331 - 2² = 12211327 is a prime.

It is a super-2 number, since 2×12211331² = 298233209583122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12211333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4430 + ... + 6636.

It is an arithmetic number, because the mean of its divisors is an integer number (1669248).

Almost surely, 2^12211331 is an apocalyptic number.

12211331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12211331 is a deficient number, since it is larger than the sum of its proper divisors (1142653).

12211331 is a wasteful number, since it uses less digits than its factorization.

12211331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2721.

The product of its digits is 36, while the sum is 14.

The square root of 12211331 is about 3494.4714907980. The cubic root of 12211331 is about 230.2789997988.

Adding to 12211331 its reverse (13311221), we get a palindrome (25522552).

It can be divided in two parts, 1221 and 1331, that added together give a palindrome (2552).

The spelling of 12211331 in words is "twelve million, two hundred eleven thousand, three hundred thirty-one".