12120331 has 4 divisors (see below), whose sum is σ = 12138912. Its totient is φ = 12101752.

The previous prime is 12120307. The next prime is 12120343. The reversal of 12120331 is 13302121.

12120331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13302121 = 7 ⋅1900303.

It is a cyclic number.

It is not a de Polignac number, because 12120331 - 2²¹ = 10023179 is a prime.

It is a super-2 number, since 2×12120331² = 293804847099122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12120301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8275 + ... + 9628.

It is an arithmetic number, because the mean of its divisors is an integer number (3034728).

Almost surely, 2^12120331 is an apocalyptic number.

12120331 is a deficient number, since it is larger than the sum of its proper divisors (18581).

12120331 is an equidigital number, since it uses as much as digits as its factorization.

12120331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18580.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 12120331 is about 3481.4265754142. The cubic root of 12120331 is about 229.7055526342.

Adding to 12120331 its reverse (13302121), we get a palindrome (25422452).

The spelling of 12120331 in words is "twelve million, one hundred twenty thousand, three hundred thirty-one".