12120231 has 8 divisors (see below), whose sum is σ = 16717680. Its totient is φ = 7801472.

The previous prime is 12120223. The next prime is 12120239. The reversal of 12120231 is 13202121.

It is an interprime number because it is at equal distance from previous prime (12120223) and next prime (12120239).

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 12120231 - 2³ = 12120223 is a prime.

It is a super-2 number, since 2×12120231² = 293799998986722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12120239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69570 + ... + 69743.

It is an arithmetic number, because the mean of its divisors is an integer number (2089710).

Almost surely, 2^12120231 is an apocalyptic number.

12120231 is a deficient number, since it is larger than the sum of its proper divisors (4597449).

12120231 is a wasteful number, since it uses less digits than its factorization.

12120231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139345.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 12120231 is about 3481.4122134559. The cubic root of 12120231 is about 229.7049208963.

Adding to 12120231 its reverse (13202121), we get a palindrome (25322352).

The spelling of 12120231 in words is "twelve million, one hundred twenty thousand, two hundred thirty-one".