12031121 has 8 divisors (see below), whose sum is σ = 12864384. Its totient is φ = 11211840.

The previous prime is 12031111. The next prime is 12031133. The reversal of 12031121 is 12113021.

12031121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a de Polignac number, because none of the positive numbers 2^k-12031121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12031111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1685 + ... + 5186.

It is an arithmetic number, because the mean of its divisors is an integer number (1608048).

Almost surely, 2^12031121 is an apocalyptic number.

It is an amenable number.

12031121 is a deficient number, since it is larger than the sum of its proper divisors (833263).

12031121 is a wasteful number, since it uses less digits than its factorization.

12031121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6991.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 12031121 is about 3468.5906359788. The cubic root of 12031121 is about 229.1405923980.

Adding to 12031121 its reverse (12113021), we get a palindrome (24144142).

The spelling of 12031121 in words is "twelve million, thirty-one thousand, one hundred twenty-one".