12081331 has 2 divisors, whose sum is σ = 12081332. Its totient is φ = 12081330.

The previous prime is 12081319. The next prime is 12081343. The reversal of 12081331 is 13318021.

12081331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (12081319) and next prime (12081343).

It is a cyclic number.

It is not a de Polignac number, because 12081331 - 2⁵ = 12081299 is a prime.

It is a super-2 number, since 2×12081331² = 291917117463122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12081299 and 12081308.

It is not a weakly prime, because it can be changed into another prime (12081031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6040665 + 6040666.

It is an arithmetic number, because the mean of its divisors is an integer number (6040666).

Almost surely, 2^12081331 is an apocalyptic number.

12081331 is a deficient number, since it is larger than the sum of its proper divisors (1).

12081331 is an equidigital number, since it uses as much as digits as its factorization.

12081331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 12081331 is about 3475.8209102311. The cubic root of 12081331 is about 229.4589107871.

Adding to 12081331 its reverse (13318021), we get a palindrome (25399352).

The spelling of 12081331 in words is "twelve million, eighty-one thousand, three hundred thirty-one".