12031031 has 4 divisors (see below), whose sum is σ = 12356232. Its totient is φ = 11705832.

The previous prime is 12031003. The next prime is 12031039. The reversal of 12031031 is 13013021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12031031 is a prime.

It is a super-2 number, since 2×12031031² = 289491413845922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12031039) 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, 162545 + ... + 162618.

It is an arithmetic number, because the mean of its divisors is an integer number (3089058).

Almost surely, 2^12031031 is an apocalyptic number.

12031031 is a deficient number, since it is larger than the sum of its proper divisors (325201).

12031031 is an equidigital number, since it uses as much as digits as its factorization.

12031031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325200.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 12031031 is about 3468.5776623855. The cubic root of 12031031 is about 229.1400210269.

Adding to 12031031 its reverse (13013021), we get a palindrome (25044052).

The spelling of 12031031 in words is "twelve million, thirty-one thousand, thirty-one".