12031021 has 8 divisors (see below), whose sum is σ = 12268800. Its totient is φ = 11795280.

The previous prime is 12031003. The next prime is 12031039. The reversal of 12031021 is 12013021.

It is an interprime number because it is at equal distance from previous prime (12031003) and next prime (12031039).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12031021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12030989 and 12031007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12031051) 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, 16615 + ... + 17323.

It is an arithmetic number, because the mean of its divisors is an integer number (1533600).

Almost surely, 2^12031021 is an apocalyptic number.

It is an amenable number.

12031021 is a deficient number, since it is larger than the sum of its proper divisors (237779).

12031021 is an equidigital number, since it uses as much as digits as its factorization.

12031021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1019.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 12031021 is about 3468.5762208722. The cubic root of 12031021 is about 229.1399575410.

Adding to 12031021 its reverse (12013021), we get a palindrome (24044042).

The spelling of 12031021 in words is "twelve million, thirty-one thousand, twenty-one".